Altyn-Arashan Hike and Hot Springs

The springs come up on the right bank of the Arashan river in three groups, and most of the water runs into small pools inside wooden sheds next to the guesthouses. The hydrogen-sulphide springs reach up to 41 °C and the radon springs up to 32 °C, according to the Bishkek outlet We Project in September 2026, so the pools vary a lot from one shed to the next. Kabar, the state news agency, describes the water as warm all year.

The pools belong to the guesthouses, and staying at one is the easiest way to use its pool; several are free for their own guests. We found no published 2025 or 2026 price for non-guests, so ask at the door before you get in. A 2026 visitor who drove up advises booking pool time in advance in summer, when the trekking groups arrive.

Keep each soak to about 20 to 30 minutes, get out if you feel dizzy, and skip it after a few beers. If you have a heart condition or are pregnant, ask your doctor before you go: this is mineral water at altitude.

About 1 km downstream from the guesthouses, two small covered pools sit right by the Arashan river. OpenStreetMap names them Frog Princess (Tsarevna-lyagushka) and Swallow’s Nest (Lastochkino gnezdo), and both are marked free and open around the clock. A 2026 guide puts the springs about a 20-minute walk along the river from the guesthouses.

This is our pick for a soak you do not have to arrange with anyone. Go early in the morning or late in the afternoon, when the trekking groups are elsewhere, and bring a head torch if you go after dark: there is no lighting. Some of the baths in the valley are roofed and others are open rock basins, so expect something rougher than a guesthouse shed.

There are no changing rooms or toilets here. Take your rubbish back with you and do not use soap in the pools or the river.

The springs have a small village of places to stay, and it keeps growing. Older guesthouses include Ala-Kul Guesthouse, Yak Tour and ELZA, and at least seven newer places opened between May 2025 and September 2026, among them the Arashan Hotel, Ethno Yurt camp, ABAY Ethno town, Aalam, Emin Sky Camp, Kerben and Bulaksay. Some have a bar and Wi-Fi now; most are still simple rooms or yurts with shared toilets and wood stoves.

We found no price published by any of them for 2025 or 2026, so ask when you book and check whether dinner, breakfast and the pool are included. For a comparison, 24.kg reported in April 2026 that tour operators were selling two-day Altyn-Arashan tours at 7,800 to 9,000 som per person.

Electricity can be limited, a hot shower is not guaranteed, and phone signal is weak to absent: reports in 2026 range from none at all to O! and MegaCom working near the springs. Book ahead for July and August, and call first outside summer, as only some guesthouses stay open in winter.

South of the springs the valley opens into wide meadows with the river braided across them, and the white massif of Palatka (‘Tent’) peak at the end. The peak’s height is given anywhere from 4,260 to 5,240 metres depending on the source, so all we will say is that it is well over 4,500 metres and covered in ice. Yurt camps have spread up here too: two are mapped about 2 to 3 km above the springs.

This is the walk to do on a second day: follow the river upstream as far as you like and come back the same way. Horse tours that stay in Altyn-Arashan ride towards Palatka and back in about 6 hours, a round trip of about 20 km, which gives an idea of the scale. Turn round in good time, as the weather can change fast at this height.

The whole valley is inside the Teploklyuchenka game reserve, set up in 1958 and covering 32,200 hectares, with brown bear, wolf, lynx and, higher up, snow leopard and Siberian ibex. Keep your distance from any wildlife, and do not light fires.

Ak-Suu is the old spa town below the valley, still often called by its Soviet name, Teploklyuchenka. Marshrutka 350 runs there from the Ak-Tilek (Big Bazaar) stand in Karakol every 10 minutes from 07:20, takes about 20 minutes and costs from 50 som, plus 30 som for a trekking bag (2025). Ask for the Altyn-Arashan turn-off.

Above the town, the track into the valley passes a checkpoint with a ticket point and a hiking map board. A note on OpenStreetMap from July 2025 gives the fee as 220 som per person, checked on the way in and out, and travellers’ reports from 2025 and 2026 range from 100 som (for a CIS citizen) to about 300 som. We found no official tariff, so carry about 300 som in small notes. By road it is 16.9 km from central Karakol to the checkpoint.

There is a drinking-water spring just below the checkpoint. This is also where the UAZ drivers wait for passengers, so if you plan to ride up, arrive in the morning to find a seat.

The track from the bottom of the valley to the springs is 16.7 km long and climbs 682 metres, and it is unpaved and very rough, with no place for anything but a heavy-duty 4x4. Most people ride up in a UAZ van, the boxy Soviet off-roader, and the drive takes 2 to 3 hours. A driver who did it in a newer UAZ Patriot in 2026 took about 2 hours for 14 km in low-range gear.

A 2026 trekking guide puts a UAZ at about 8,000 som per vehicle one way, or about 1,500 to 3,000 som per seat if you share. There is no fixed price, so agree it before you get in and say whether it is one way or return. Do not try it in a rental crossover: leave the car in Ak-Suu.

Our advice: ride up and walk down. The ride saves you the long climb at the start of the trip, and the walk down along the river is the nicer half of the valley.

The walk follows the same track up the Arashan river, first through a narrow gorge and relict Tian Shan spruce forest, then out into the open valley below the springs. Most guides put it at about 16 km and 4 to 7 hours uphill. Coming down, a Karakol tour operator gives about 18 km and 4 to 5 hours from the springs to Ak-Suu.

It is a long day rather than a hard one, but there are steep, rocky stretches, and the UAZs share the track. Start early, carry lunch, and treat the water from the springs along the path before drinking it. Bears live in the forest, so make some noise and keep food packed away.

If you only walk one way, walk down. A 2026 visitor gives the same advice, and the downhill takes a few hours less.

Altyn-Arashan is the far end of the Ala-Kul trek, one of the best-known treks in Kyrgyzstan. The usual loop goes up the Karakol gorge to Ala-Kul lake, over the pass above it, down through the Keldike valley to Altyn-Arashan and out to Ak-Suu: about 50 km over 2 to 4 days. The pass is given as anything from 3,860 to 3,990 metres; call it nearly 3,900.

From the camps in the Keldike valley, at about 3,200 metres, it is about 11 km and 3 to 4 hours down to Altyn-Arashan, dropping about 1,100 metres. Yurt camps on this side charged 4,200 som per person for a bed with dinner and breakfast in 2025, and two new ones were mapped in July 2026. Most camps close around 15 September.

We would walk it this way round, finishing in the hot springs, and do it from late June to September, as snow can lie on the pass into summer. Going the other way, from Altyn-Arashan, means a 1,100-metre climb on the first full day.

Ala-Kul is a glacier-fed lake held back by a natural rock dam, 2.8 km long and 600 to 700 metres wide at 3,532 metres, with its water seeping out under the dam into the Karakol river. It is frozen from October to May, which sets the trekking season.

From Altyn-Arashan the lake lies over the pass, so we would spend a night in the Keldike valley on the way, or walk the whole loop from Karakol. From the top of the pass you look straight down on the water.

There are no camps at the lake itself: lakeside camping needs your own tent, and the nearest yurt camps are below the pass on either side.

If you do not have two days, Ak-Suu Kench is the hot-spring stop at the foot of the valley, about 30 minutes by car from Karakol at the Ak-Suu resort. It is a developed open-air complex with showers and pools for children, and it is open all year, though it can close for renovation.

As listed on OpenStreetMap in June 2026, entry is 300 som an hour and it is open 09:00 to 23:00. It is 16.7 km from central Karakol by road, and marshrutka 350 from Ak-Tilek goes to Ak-Suu (from 50 som in 2025). Call ahead on +996 773 037 678 in the off-season.

This is our pick for a soak on the way back down from Altyn-Arashan or the Ala-Kul trek, when the pools in the valley are a day behind you.