Trail run

Běhej lesy Jizerská

Běhej lesy Jizerská takes place on Sat, Aug 29, 2026 in Bedřichov, Czechia. The main route is 50 km.

Trasy vedou ve stopách legendárního zimního závodu Jizerská 50 a nabízejí přírodu v těch nejzelenějších barvách a čerstvý horský vzduch.

What this race demands

Běhej lesy Jizerská 50 requires sustained aerobic endurance over a 50 km trail distance with 879 meters of climbing.

Aerobic endurance

The 50 km distance demands a high level of cardiovascular capacity and muscular stamina to sustain forward motion over several hours.

Climbing economy

The accumulated elevation gain of 879 meters requires efficient pacing on ascents to preserve leg strength for the latter half of the race.

Trail durability

Running on forest paths and historical tracks places continuous mechanical demands on the lower limbs and stabilizing muscles.

Given the duration of the event, aim for 60 to 90 grams of carbohydrates per hour to maintain energy levels throughout the effort.

Competitive (sub-3:15 marathon ability)4:00–4:30

Advanced (sub-3:45 marathon ability)4:30–5:15

Intermediate (sub-4:15 marathon ability)5:15–6:15

First-timer / Finisher6:15–7:30

Estimates by level, not promises. Your own number depends on your fitness on the day.

Organising this race?