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

Fixed Distance 50 mi

Čertovskej Ultratrail

227 days away

66.6 km Distance

1,800 m Climbing

6.0 Grit · Hardcore

50.7025° N, 14.8386° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

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. Comfortable. Room to walk the climbs and stop at aid. About average for a 50 mi. Measured against 479 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.

Typical conditions, June

Daytime high 22°C

Night low 12°C

Rainfall Mostly dry

Daylight 16 h 16 m of light

Regional 2001-2020 average for June — NASA POWER, grid elevation 374 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	66.6km	214	Milan Hricko · 06:20:24	Dorothea Rezacova · 07:02:49
2025	66.6km	182	Adam Antonin · 06:45:04	Lucie Bancikova · 07:39:41
2024	66.6km	191	Jan Sunka · 06:25:39	Olga Krcalova · 06:44:09
2023	66.6km	193	Miroslav Smatolan · 06:07:34	Tereza Gavendova · 07:13:01
2022	66.6km	199	Lukas Kozlik · 06:02:43	Radka Churanova · 06:22:29
2021	66.6km	138	Tomas Hak · 06:14:06	Katerina Novotna · 07:49:18
2020	66.6km	157	Ondrej Pavlu · 05:47:29	Iveta Fortova · 07:12:37
2019	66.6km	111	Libor Erben · 05:58:59	Iva Krouzilova · 07:51:46
2018	66.6km	82	Stepan Dvorak · 07:16:18	Iva Krouzilova · 08:05:05
2017	66.6km	42	Petr Herejt · 06:23:54	Kristyna Junkova · 07:39:09

The field grew 18% between 2025 (182) and 2026 (214). 33% of the 2026 field were women.

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.

Course notes

terrain This is a rolling course. Expect fast, runnable sections where rhythm is key.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

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.

Adidas

Terrex Agravic Speed Ultra

RunRepeat found the Adidas Terrex Agravic Speed Ultra to be perfect for midfoot and forefoot strikers, while iRunFar noted that the shoe feels incredibly effici…

★★★★★ 4.5

New Balance

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

LEKI

Ultratrail FX.One

Ultra-light carbon folding poles (135g each) designed for mountain ultra racing.

$200 ★★★★★ 4.6

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

All gear guides →

Overview

The Čertovskej Ultratrail is a 66.6 km trail race with 1800 meters of elevation gain, taking place in Hamr na Jezere, Czechia, on June 5, 2027. This 50-mile event has a climb rate of 27 meters per kilometer.

With a time limit of 13 hours, the cut-off pace is 11.7 minutes per kilometer. This time limit is more generous than 58% of 50-mile races. The race has seen up to 214 finishers in its latest edition.

The field size is bigger than 89% of 50-mile fields. The entry fee is 44 €.

Similar races

Other 50 mi trail ultras, closest in distance first.