Stage 4 of 4 · Iso Karhunkierros
Bistron rinne → Juuma
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Huts along this stage
Mapped in OpenStreetMap within 300 m of the line. TrailSplits has not checked whether they are open, sleep walkers or take bookings: ask each one.
- Valtavaara· unstaffed hut· 487 m km 5.4 · on the line
- Myllytupa päivätupa· unstaffed hut km 23.4 · on the line
Route briefing
What comes next
Climbs, descents and access in route order. Not listed does not mean absent: it may not be mapped.
Start
0 m
Bistron rinne
Start
Route geometry · source 2026-04-01
About 0 min in
26.5 km remaining
+548 m remaining
Access
41 m
Ruka Valley
Station
OpenStreetMap · source 2026-04-01
About 1 min in
26.4 km remaining
+548 m remaining
Climb
800 m
83 m climb
0.5 km at 16.0% average
OpenStreetMap route data · source 2026-04-01
About 13 min in
25.7 km remaining
+548 m remaining
Access
1.7 km
Saarua Top
Station
OpenStreetMap · source 2026-04-01
About 28 min in
24.7 km remaining
+445 m remaining
Descent
2.6 km
83 m descent
0.5 km at 16.1% average
OpenStreetMap route data · source 2026-04-01
About 42 min in
23.9 km remaining
+383 m remaining
Climb
3.1 km
99 m climb
1.0 km at 9.5% average
OpenStreetMap route data · source 2026-04-01
About 50 min in
23.3 km remaining
+383 m remaining
Finish
26.5 km
Juuma
Finish
Route geometry · source 2026-04-01
About 7h 07m in
0 m remaining
Trail route lab
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Getting Here
Bistron rinne (bus stop)
55m from trailhead · ~1 min walk
Getting Out
Juuma Retkietappi (bus stop)
1571m from trail end · ~20 min walk
Segment Breakdown
Auto-analyzed from the elevation profile. Each segment shows the dominant character for planning your effort.
| Segment | Dist | ↑ / ↓ | Time | Character |
|---|---|---|---|---|
Bistron rinne → km 8.8 (336m) 336–481m | 8.8 km | +325m / -396m | 2h 48m | 📉 Descending |
km 8.8 (336m) → km 17.7 (277m) 276–357m | 8.8 km | +61m / -121m | 2h 09m | 📉 Descending |
km 17.7 (277m) → Juuma 230–277m | 8.8 km | +66m / -101m | 2h 09m | 🏃 Highly Runnable |
| Total | 26.5 km | +548m / -726m | 7h 07m |
Pace & Fuel Calculator
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Terrain Analysis
Surface & Technicality
Gradient describes steepness, not exposure, scrambling, footing or current conditions. Technical difficulty is unknown where no mapped rating is available.
Surface
Estimated for the full route from the 51% with mapped surface data in OpenStreetMap.
Current Conditions
Based on 1991–2020 climate averages, the weather on Iso Karhunkierros Stage 4: Bistron rinne → Juuma is usually best from June to September. Snow is likely at the high point (489 m) in November to May.
Weather this week
Loading the forecast for low point (225 m) and high point (489 m)…
Weather by month
Typical weather on this stage: at the lowest point (225 m) and the highest point (489 m). Select a month to see why it is rated as it is.
| Month | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather | Poor | Poor | Poor | Poor | Poor | Good | Good | Good | Good | Poor | Poor | Poor |
| High point, day / night | -8°/-17° | -8°/-17° | -3°/-14° | 3°/-7° | 9°/-1° | 15°/5° | 18°/8° | 15°/6° | 9°/2° | 2°/-3° | -3°/-9° | -6°/-14° |
| Low point, day / night | -8°/-18° | -7°/-17° | -1°/-13° | 5°/-6° | 11°/0° | 17°/6° | 20°/10° | 17°/7° | 11°/3° | 4°/-2° | -2°/-8° | -5°/-14° |
| Rain, mm | 40 | 34 | 33 | 31 | 53 | 68 | 86 | 68 | 58 | 56 | 52 | 46 |
| Snow at high point | Likely | Likely | Likely | Likely | Likely | – | – | – | Frost | Possible | Likely | Likely |
| Daylight | 4 h 19 | 8 h 08 | 11 h 32 | 15 h 16 | 19 h 09 | 24 h | 21 h 21 | 17 h 04 | 13 h 18 | 9 h 44 | 5 h 56 | 2 h 47 |
Source: TerraClimate 1991–2020 monthly averages. Averages for the area at each point’s elevation (4 km grid, corrected for height). Not a forecast or a report of current trail conditions. Snow at the high point is estimated with a simple snowpack model from these temperatures and precipitation, not observed; steep islands and high summits can hold more snow than it shows. Daylight is for the 15th of each month. Hut, transport and park seasons are separate: check them for your dates.
Averages cannot establish current trail conditions. Check recent local reports, the forecast and restrictions before departure. Snow and ice can persist on shaded sections or arrive outside the usual season.
Planning ahead?
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Safety & Bailouts
We do not have a verified emergency exit plan for this route. A nearby settlement, hut or route endpoint is not necessarily reachable or open. Do not leave the trail based on a straight-line distance or compass direction.
Review possible exits against current local information before your trip. In an emergency, contact local rescue services; this page is not live rescue guidance.
Suggested Gear List
Auto-generated based on 26.5 km, 548m ascent, max altitude 488.8m, ~7h duration.
- 👟 Trail running shoes / hiking bootsRequired for any trail
- 📱 Phone (charged) + offline mapNavigation & emergency contact
- 💧 3L hydration vestWater source information is incomplete; plan supplies before departure
- 🍫 Trail mix, bars & sandwichEst. 1934 kcal burn
- 🆘 Emergency space blanketCritical for preventing hypothermia if you stop moving
- 🧴 SunscreenBasic sun protection
- 🧥 Light rain jacketWeather changes fast in the mountains
- 🔦 Headlamp7h route — plan for delays
- 🩹 Mini first aid kitBlister plasters, tape, antiseptic
- 🧊 Microspikes / light cramponsSnow risk in Jan, Feb, Mar
- 🦵 GaitersKeep snow out of boots
Logistics
This route runs from Bistron rinne to Juuma (26.5 km by trail). You'll need to arrange transport back to your starting point.
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