Tyresö Extreme Challenge (TEC) - 100 miles

Race completed

161 km Distance

3,525 m Climbing

10.0 Grit · Elite / extreme

59.2167° N, 18.3333° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 22 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 30 hours 11:11 min/km average. Generous. Walkable throughout for most of the field. Tighter than 78% of 100 mi races. Measured against 46 races of the same distance. Cut-off calculator →

Field size ~20 Small. Long stretches with nobody in sight.

DUV results for the 2026 edition (100mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, April

Daytime high 7°C

Night low 2°C

Rainfall Mostly dry

Daylight 14 h 40 m of light

Regional 2001-2020 average for April — NASA POWER, grid elevation 19 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a rolling course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 161 km of trail with 3,525 m of ascent.

Trail Running Shoes22 m of climb per kilometre — grip and rock protection before cushioning.
Race NutritionPast 161 km the palate quits before the legs do — carry more than one flavour.
Hydration VestsPole attachment and chest-strap stability on steep ground.
Trekking Poles3,525 m of ascent to walk up.
HeadlampsA 30 h limit puts you out there after dark.

Salomon

Ultra Glide 4

$159.95 ★★★★★ 4.6

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Spring Energy