Hamr na Jezere, Czechia · Saturday, June 5, 2027

Fixed Distance 50 mi

Čertovskej Ultratrail

272 days away

66.6 km Distance

1,800 m Climbing

6.0 Grit · Hardcore

What the course asks

Climbing rate 27 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 13 hours 11:43 min/km average. Generous. Walkable throughout for most of the field. About average for a 50 mi. Measured against 449 races of the same distance. Cut-off calculator →

Field size ~214 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (66.6km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

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

Gear for this race

Chosen for 67 km of trail with 1,800 m of ascent.

Trail Running Shoes 27 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 67 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 1,800 m of ascent to walk up.
Headlamps A 13 h limit puts you out there after dark.