Riga, Latvia · Saturday, May 1, 2027

Fixed Distance 100K

Riga-Valmiera

175 days away

107 km Distance

360 m Climbing

5.9 Grit · Challenging

56.9460° N, 24.1059° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 3 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 19 hours 10:39 min/km average. Generous. Walkable throughout for most of the field. About average for a 100K. Measured against 233 races of the same distance. Cut-off calculator →

Field size ~198 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2026 edition (107km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, May

Daytime high 16°C

Night low 7°C

Rainfall Mostly dry

Daylight 15 h 26 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 43 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat 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 107 km of trail with 360 m of ascent.

Trail Running Shoes107 km of trail — cushioning that is still there in the last quarter.
Race NutritionPast 107 km the palate quits before the legs do — carry more than one flavour.
Hydration VestsFlask capacity for 107 km, without the bounce.
HeadlampsA 19 h limit puts you out there after dark.
AccessoriesChafe and blisters end more 107 km races than fitness does.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Asics