Radioaseman Ultra Maraton 100 km

Race completed

100 km Distance

2 m Climbing

5.0 Grit · Challenging

61.4807° N, 21.7852° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 0 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Field size ~2 Tiny. You will run alone for most of it.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 15°C

Night low 9°C

Rainfall Mostly dry

Daylight 12 h 00 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 45 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	100km	2	Juuso Kivilähde · 08:08:32	—
2024	100km	3	Matti Jonkka · 07:47:37	Hanna Kuusela · 09:57:14
2023	100km	3	Mika Koivumäki · 10:56:09	Katja Kantanen · 10:39:16
2022	100km	1	—	Iida Sinisalo · 09:13:58
2021	100km	4	Matti Jonkka · 08:06:24	—
2020	100km	4	Tom Olsson · 09:43:15	Milka Rajala · 10:40:22

The field shrank 33% between 2024 (3) and 2025 (2). 0% of the 2025 field were women.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

terrain This is a fast & flat course. Expect fast, runnable sections where rhythm is key.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
nutrition For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

Gear for this race

Chosen for 100 km of trail with 2 m of ascent.

Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Flask capacity for 100 km, without the bounce.
Headlamps 100 km almost certainly means running into the night.
Accessories Chafe and blisters end more 100 km races than fitness does.