Fly Fishing Mongolia & the Far East — Taimen, Catch and Release, and How to Get There
Curated by Our Guild Explorers · Checked against the Law of Mongolia on Animals, Mongolia’s Ministry of Environment and Climate Change, the Hokkaido Government and the U.S. State Department, 12 October 2026
The taimen is the largest member of the salmon and trout family on earth. It lives in the cold rivers of Mongolia and Siberia, it can live for decades, and it eats what it can swallow — fish, ducklings, and the mice and voles that swim across the river at night. That is why the classic way to catch one is a big floating mouse pattern skated across the surface at dusk. Nothing else in fly fishing quite compares to watching a fish the length of a man come up behind it.
Taimen are also in trouble across most of their range, and in Mongolia they survive in good numbers largely because the fishing is now run on strict catch-and-release rules, with the trips themselves paying for the protection of the rivers. This page explains how it works for a visitor: the rivers the camps fish, the months, the permit, the law on hooks and release, how you actually reach a river that has no road to it, and the Japanese cousin of the taimen, the itou, on the island of Hokkaido. Where we could not confirm something from the agency itself, we say so.
Book it. Then Hook it. (Catch & Release)
Destinations Guild is a travel reservation site as well as a fishing library. In Mongolia the camp on the river is part of your fishing trip, so the room you book yourself is the night or two in Ulaanbaatar before and after — every outfitter we checked builds that in. In Hokkaido you stay in town and drive to the river. Every town below is pinned to the right place on Trip.com.
Rooms are booked through our partner Trip.com. Destinations Guild earns a small commission when you book, at no extra cost to you. Vacation-home buttons for these towns are coming.
How taimen fishing works — read this first
This is not a trip you can do on your own. That is the first thing to know.
A camp, a permit and a guide — all in one booking
Mongolia’s taimen rivers are hundreds of miles from the capital, with no roads along them, no fly shops, no hotels and no mobile signal. Every visiting angler we know of fishes with an outfitter that holds rights to a stretch of river, runs a tented or ger camp (the round felt tent of the herders) or a float trip down it, and arranges the permits, the flights and the drive. You book one package, usually a week on the water, and the outfitter meets you in Ulaanbaatar.
There are two styles. A fixed camp stays put and runs jet boats up and down a long stretch of river each day — this is how the Sweetwater camps on the Eg and the Uur work. A float trip moves camp down the river every day or two in rafts, so you fish new water all week — this is how Mongolia River Outfitters runs the Delger and the Onon. Prices for a week are in the thousands of dollars; Mongolia River Outfitters lists US$8,500 a person for 2026–27, before international flights.
Confirmed with the U.S. State Department, 12 October 2026 — for rural Mongolia: “First responders cannot reach remote areas in case of emergencies”; “Cell phone and emergency services may not exist in rural areas”; “Helicopter evacuation is not available” on rural roads; and travelers are advised to “travel with a tour company or in a group”. It strongly recommends supplemental insurance “to cover medical evacuation.” Buy evacuation insurance before you go, and ask your outfitter what their own emergency plan is.
The rivers the camps fish
Three river systems, all in the north, where the steppe meets the Siberian forest.
The Eg and the Uur — Khövsgöl province
The Eg drains out of Lake Khövsgöl, the great clear lake on the Russian border, and is joined by the Uur before both run on to the Selenge. Sweetwater has fished here since the 1990s from two fixed camps — one near the meeting of the two rivers and one, Tarialan, on the lower Eg — reaching what its agents describe as “over 120 miles of river” by jet boat. This watershed is where much of the work to protect taimen through fishing began.
Season and what to expect: Aardvark McLeod lists the camp’s season as August, September and October; Montana Angler, which also sells it, describes a spring season in May and June and a fall season in September. Expect a comfortable camp, jet-boat runs to each pool, big mouse flies for taimen, and lenok and grayling between them.
Confirmed with Aardvark McLeod, 12 October 2026 — the camp is “Located in the Khövsgöl region of Northern Mongolia”, and “All fishing is catch and release with single, barbless hooks”. Besides taimen the rivers hold “lenok trout and grayling and even a few northern pike.” We could not open Sweetwater’s own website; this is from two agents that sell its trips.
The Delger (Delger Mörön) — north-west Mongolia
The Delger rises in the mountains of western Khövsgöl province and winds through canyon and steppe to join the Selenge. It is float-trip country: you camp on gravel bars and fish new water every day. Mongolia River Outfitters set up what it calls “the world’s first taimen sanctuary” here in 2008.
Season and what to expect: summer. Aardvark McLeod listed the Delger trips for July and August in 2024. Getting there is part of the adventure: a domestic flight from Ulaanbaatar to Mörön, then, according to one agent selling the trip, about eight hours by Land Cruiser to the river.
Confirmed with Fish Mongolia, 12 October 2026 — “The first ‘taimen sanctuary’ was established in 2008”, “The second in 2015”, and “All taimen must be released safely back into the river.” Fish Mongolia and Mongolia River Outfitters belong to the same group.
The Onon — north-east Mongolia, the autumn river
The Onon rises in the Khentii mountains, the homeland of Chinggis Khaan, and flows north-east into Russia, where it eventually becomes part of the Amur. Mongolia River Outfitters floats it in upper and lower sections. It is the late-season river: the one the outfitters fish in September and October, until the snow comes.
Season and what to expect: Mongolia River Outfitters says it fishes north-central Mongolia from June to August and eastern Mongolia in September and October. The Onon is reached by a charter flight of about an hour and a half from Ulaanbaatar, or by a long drive across the steppe. Besides taimen and lenok, the Amur basin holds Amur pike.
Confirmed with Mongolia River Outfitters, 12 October 2026 — “We are on the river June – October”; the rules are “catch-and-release, single-barbless hook, fly-fishing only for all international anglers”; and after a night in the capital “you’re off for an adventure-filled 4×4 journey across the Mongolian steppe to reach the river”, though “Charter flights to/from the river can be arranged.”
When to go — a month-by-month sketch
Built from the law’s closed seasons and the outfitters’ own dates. The fishing year is short; book a year ahead.
The year on a taimen river
November to March: the rivers freeze hard. No fishing trips run.
1 April to 15 June — closed: Mongolia’s spawning-season ban. No fishing for most species.
Mid-June to August: the outfitters start on the rivers of north-central Mongolia — the Delger, the Eg and the Uur. Long days, warm water, insect hatches for lenok and grayling, and taimen on mice and big streamers. Summer storms can colour the water.
September to mid-October: autumn on the Onon and the Eg. The larches turn gold, the nights are frosty, and the big fish feed before winter. The season ends with the first serious snow.
Confirmed with the Law of Mongolia on Animals, 12 October 2026 — Article 9.2.8 bans fishing “From April 1 to June 15 of every year for fish other than those stated in 9.2.3-9.2.7 of this law.” Article 9.8.6, in the article on taking rare animals alive, gives “from October 30 of every year to June 15 of the following year for taimen.” The Ministry of Environment and Climate Change announced that the 2026 spawning ban ended on 15 June 2026 (iKon.mn, 4 June 2026). Some outfitters run spring trips in May; Frontiers calls its spring dates “tentative due to Mongolian regulations”. Ask exactly what is permitted before you book a spring week.
Getting there
A long way, in three stages.
From home to the river
1. Fly to Ulaanbaatar. The international airport is Chinggis Khaan International, south of the city. From North America most routes connect through an Asian hub such as Seoul or Tokyo. Plan a night — better two — in Ulaanbaatar at the start: Frontiers recommends an extra overnight there in case of delays, and all the outfitters we checked meet you in the city.
2. Fly or drive into the country. Depending on the river: a charter plane of an hour or so (Mongolia River Outfitters says 60 to 90 minutes, and Frontiers quoted US$840 for the charter), a helicopter to the Sweetwater camps (Montana Angler gives US$885), or a scheduled flight to Mörön followed by a day on the road. The outfitter arranges this part.
3. Onto the river by jet boat or raft.
Confirmed with the U.S. State Department, 12 October 2026 — Mongolia: “Level 1 – Exercise normal precautions” (issued 29 July 2026), and “You can stay in Mongolia without a visa for 90 days for tourism or business.” That is for U.S. passports. Other travelers should check with the Mongolian embassy. Weight limits on the small planes are strict — ask your outfitter for the luggage allowance before you pack.
Rods and flies — big rods, big flies, single barbless hooks
The outfitters send detailed kit lists. This is the shape of them.
What to bring
For taimen: a 9-foot rod for an 8- to 10-weight line, a strong reel with real drag, a floating line for mice and a sink-tip for streamers, and short, stout leaders — taimen are not leader-shy. The fly that everyone talks about is the mouse: Aardvark McLeod describes “big mouse imitations” on the Eg and Uur, and Frontiers says most large fish fall to skated mouse patterns. Frontiers also says its guides supply all taimen flies. Every hook must be single and barbless.
For lenok and grayling: a 5- or 6-weight rod with dry flies and nymphs. On many days this is the fishing you will do most.
Everything else: layered clothes for frost at dawn and heat at noon, a good rain jacket, breathable waders and wading boots, polarising glasses, insect repellent, a headlamp, and a spare rod — there is no fly shop for hundreds of miles.
A note on sources — the rod and line weights are our advice, written from general practice for large predatory fish, not from any agency. Follow your outfitter’s own kit list.
Permits and the law, plainly
The law, the permit and the camp rules all say the same thing: every taimen goes back.
Catch and release on single barbless hooks
Mongolia’s Law on Animals requires “rare game fish” to be caught on a single barbless hook with an artificial lure and released. Every outfitter we checked goes further for visiting anglers: fly fishing only, single barbless hooks, and every taimen released. Handle the fish in the water, keep the photograph quick, and let your guide do the unhooking if you are unsure.
Confirmed with the Law of Mongolia on Animals, 12 October 2026 — Article 21.1: “Citizens with hunting permit shall meet the following requirements”, including 21.1.6, “Catch rare game fish with fishhook having only one branch shank and point without barb using artificial bait and release.” The law’s list of rare animals is set by a separate government resolution, and we could not read that list in full. Fish Mongolia states that “No one in Mongolia can legally fish for taimen using a barbed hook, a treble hook, a double hook or even a ‘stinger’.” We quote it as the outfitter’s statement, not the agency’s.
The taimen permit
Visiting anglers need a taimen permit as well as the ordinary fishing permits, and the outfitter arranges them all. Both Mongolia River Outfitters and Fish Mongolia put the cost at about US$500 per angler, and Fish Mongolia says it is included in the trip price. Much of that money goes to protecting the river. Mongolians fishing for their own table use a separate, cheaper permit that is now issued online.
Confirmed with Mongolia River Outfitters and Fish Mongolia, 12 October 2026 — “Mongolian law requires that every angler obtain a variety of fishing permits”; “These permits cost approximately US$ 500/per angler” (Mongolia River Outfitters); “These permits – included in the trip costs – represent approximately US$500 per angler” (Fish Mongolia). Confirmed with the Ministry of Environment and Climate Change (via iKon.mn, 4 June 2026) — personal-use fishing permits are taken online through the ezagas.mn system, choosing the aimag, soum, place, species and quantity. We could not find the taimen permit fee on any government page. The figure is the outfitters’. Check with your outfitter and the Ministry.
The Far East: Hokkaido and the itou
Japan’s own giant salmonid, a close relative of the taimen, in the slow rivers of the far north.
The itou — rare, protected and fished with great care
The itou (Parahucho perryi, sometimes called the Japanese huchen or Sakhalin taimen) lives in the rivers, lakes and coastal lagoons of Hokkaido and the islands to the north. It is the largest freshwater fish in Japan, and it is rare. The best-known itou water is in the north of the island: slow, winding wetland rivers such as the Sarufutsu and the Teshio, and lakes such as Shumarinai near Nayoro. It is a far gentler trip than Mongolia — you stay in a town, eat very well, and drive to the river — and it combines easily with a holiday in Japan.
Season and what to expect: the guides we checked fish late May to July and again from late September into November, and leave the fish alone while they spawn in spring. Itou are caught on large streamers and mouse patterns, and released.
Confirmed with the Hokkaido Government, 12 October 2026 — the itou’s spawning season is April to May (“産卵期は4～5月”), it is the largest-growing freshwater fish in Japan, and “絶滅危惧種にも指定されています” — it is designated an endangered species. The Hokkaido Government page gives no fishing rules. Local rules are set river by river, often as voluntary requests from local groups to avoid spawning fish and to use single barbless hooks. We could not confirm the rules for any one river from an agency, so check with the Hokkaido Government and your guide before you fish.
Russia’s Far East — why we are not sending anyone
Kamchatka and the rivers of the Russian Far East are some of the great salmon and trout waters of the world. We are not recommending them now.
A plain word on safety
We will add Kamchatka and the Russian Far East to this page when it is safe and sensible for our readers to travel there. Until then, Mongolia and Hokkaido are the places we write about.
Confirmed with the U.S. State Department, 12 October 2026 — Russia: “Level 4 – Do not travel”, last updated 29 December 2025. Japan: “Level 1 – Exercise normal precautions.”
Outfitters we have checked
Seven, five for Mongolia and two for Hokkaido. We opened each one’s own website on 12 October 2026 and describe them from what they say about themselves. We have not fished with them and copy no ratings from anyone.
Mongolia — outfitters
Mongolia River Outfitters, Ulaanbaatar — float trips for taimen, lenok and grayling from June to October, fly fishing only, single barbless hooks and catch and release; runs the Delger and Onon sanctuaries.
Fish Mongolia — the same group as Mongolia River Outfitters; its pages explain the taimen permit and the conservation work behind the sanctuaries set up in 2008 and 2015.
Mongolia — agents that book the camps
Aardvark McLeod, England — a fishing-travel agency booking the Sweetwater camp on the Eg and Uur, August to October, and the Mongolia River Outfitters floats.
Montana Angler, Bozeman, Montana — sells the two Eg–Uur camps, founded in 1995, with a spring season in May and June and a fall season in September.
Frontiers — a long-established sporting-travel agency booking taimen camps in north-central Mongolia, with charter or overland transfers from Ulaanbaatar; its published fall dates on 12 October 2026 were still the 2025 ones.
Hokkaido — itou guides
Far East Fly Fishing Co. — guided itou fishing on the Sarufutsu and Teshio systems from a lodge about ninety minutes from Wakkanai airport; peak times late May, June and late September through October, and only “where local rules, river conditions, and conservation guidance allow.”
Hokkaido Angler — Denny Schaller, a fly-fishing guide in Hokkaido, fishing for itou in June and July and October and November, catch and release.
Not listed, because their own websites would not open properly for us on 12 October 2026: Sweetwater Travel (the Eg–Uur camps’ operator; its site loaded with errors and no Mongolia page) and Fly Water Travel. We will look again.
Where to base yourself
In Mongolia your outfitter houses you on the river. You choose the city hotel either side.
The towns that serve each region
For every Mongolian trip: Ulaanbaatar, the capital, where every outfitter we checked starts and finishes. Allow a spare night at each end: charter flights wait for weather, and the city’s museums, the Gandan monastery and the National Museum of Mongolia fill a day well.
For the Delger and Lake Khövsgöl: Mörön, the provincial capital of Khövsgöl, with the airport; and Khatgal, the village at the south end of Lake Khövsgöl, if you want a few days at the lake.
For Hokkaido: fly into Sapporo (New Chitose airport), or to Wakkanai in the far north for the Sarufutsu. Asahikawa is the crossroads of central Hokkaido, and Nayoro is the town for Lake Shumarinai and the upper Teshio. See our Sapporo hotels guide and Japan guide.
Travelling as a group? A Hokkaido party fishing together does well in a rented house. Our vacation-home guide covers what to ask before you pay.
Questions anglers ask us
Is taimen fishing in Mongolia catch and release?
Yes. Mongolia's Law on Animals requires rare game fish to be caught on a single barbless hook with an artificial lure and released, and every outfitter we checked runs its taimen fishing as fly fishing only, single barbless hooks, with every taimen released.
When is the taimen season in Mongolia?
Mongolian law closes fishing for most species from 1 April to 15 June each year for spawning. The outfitters we checked fish from mid-June to October: the rivers of north-central Mongolia such as the Delger, Eg and Uur in summer, and the Onon in eastern Mongolia in September and October, until the first snow.
Do I need a permit to fish for taimen?
Yes. Visiting anglers need a taimen permit as well as ordinary fishing permits, and the outfitter arranges them. Mongolia River Outfitters and Fish Mongolia both put the cost at about 500 US dollars per angler. We could not find the fee on a government page, so check with your outfitter.
Can I fish for taimen without an outfitter?
In practice, no. The rivers are far from roads, towns and mobile signal, the permits are arranged through outfitters, and the U.S. State Department advises travelling in rural Mongolia with a tour company or group. Every visiting angler we know of goes with an outfitter.
How do I get to a taimen river?
Fly to Ulaanbaatar, spend a night, then take a charter plane, a helicopter, or a domestic flight to Moron followed by a long drive, depending on the river. The outfitter arranges this part. U.S. citizens can visit Mongolia for up to 90 days without a visa.
What is the itou in Hokkaido?
The itou is Japan's giant salmonid, a close relative of the taimen, found in the rivers and lakes of Hokkaido, especially in the north on rivers such as the Sarufutsu and the Teshio. It is an endangered species and spawns in April and May. Guides fish for it from late spring into summer and again in autumn, catch and release.
What we have not checked, and will not pretend to have
The part of a fishing page most sites leave out.
Six honest gaps
The taimen permit fee in law. Two outfitters put it at about US$500 per angler. We found no government page giving the figure.
Taimen on the rare-animals list. The law’s single-barbless-hook and release rule applies to “rare game fish”. The list itself is in a government resolution whose annex we could not read. Every outfitter we checked releases every taimen.
Spring fishing. The law closes most fishing from 1 April to 15 June, yet some camps advertise May and June weeks. Ask your outfitter exactly what is permitted before you book a spring trip.
The English text of the law is published by legalinfo.mn as an unofficial translation.
River-by-river rules in Hokkaido. We could not confirm the rules for any single itou river from an agency. Ask your guide, and the Hokkaido Government.
Photographs. We could not reach Wikimedia Commons to choose and check freely licensed pictures, so this page has none rather than borrowed ones. They will be added with full credits.
Photographs: none yet — see above. Every photograph we add will be freely licensed and credited here with its author and licence.