Bedrichov, Czechia · Saturday, August 29, 2026

Fixed Distance 50K

Běhej Lesy Jizerská 50 Km

Race completed

50 km Distance

800 m Climbing

3.7 Grit · Challenging

49.4631° N, 16.4609° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 16 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 8 hours 9:36 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 89% of 50K races. Measured against 1034 races of the same distance. Cut-off calculator →

Field size ~461 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 24°C

Night low 13°C

Rainfall Mostly dry

Daylight 13 h 42 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 512 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	461	Radek Brunner · 03:05:02	Adela Hlucha · 03:25:58
2024	50km	331	Radek Brunner · 03:18:42	Tereza Zuzankova · 03:35:23
2023	50km	297	Karel Splitek · 03:11:54	Simona Tumova · 03:55:41
2022	50km	250	Petr Macek · 03:24:26	Kamila Netikova · 04:06:35
2021	50km	245	Milos Nykodym · 03:11:12	Radka Churanova · 03:47:29
2020	50km	292	Jan Svadlenka · 03:12:37	Radka Churanova · 03:39:10
2019	50km	289	David Vanek · 03:24:40	Radka Churanova · 03:33:53
2018	50km	303	David Pecina · 03:13:23	Martina Bradacova · 03:55:48
2017	50km	242	Premysl Jezek · 03:21:36	Marcela Joglova · 04:05:12
2016	50km	213	Premysl Jezek · 03:22:32	Katerina Kasparova · 04:02:31

The field grew 39% between 2024 (331) and 2025 (461). 31% of the 2025 field were women.

DUV results for the 2025 edition (50km) — 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 50 km of trail with 800 m of ascent.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Salomon

ADV Skin 12

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

$180 ★★★★★ 4.8

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Overview

Běhej Lesy Jizerská 50 Km, held in Bedrichov, Czechia, is a 50k trail race with a substantial field, larger than 98% of its 2648 peer events. This August race, organized by Ski klub Jizerska padesatka, has been run for 10 editions since 2016, with the most recent in 2025.

The course presents 800 meters of elevation gain over 50 kilometers, averaging 16 meters of climb per kilometer. With an 8-hour time limit, the cutoff pace of 9.6 minutes per kilometer is tighter than 80% of 1004 comparable 50k races.

Similar races

Other 50K trail ultras, closest in distance first.