Krakonosova 100 K55 55km: Giant Mountains Grind When the K100 Is Full

The Krakonosova K55 is the 55km distance of the Krakonosova stovka (Krakonos's Hundred), one of the oldest mountain endurance events in Central Europe. Founded in 1966 and reaching its 60th edition in 2026, the event is held annually in late June in the Krkonose (Giant Mountains) National Park, starting and finishing in Vrchlabi. The K55 runs on Saturday morning (daytime, no night section) the day after the flagship K100. It covers 55km with 2,200m D+ (40 m/km), with 44.4% of the course uphill and only 14.9% flat. Entry fee is 1,050 CZK (approximately EUR 43). The K55 is not sold out for 2026, unlike the K100 which sold out in May. The race is named for Krakonos, the legendary mountain spirit of Czech and German Riesengebirge folklore.

By per-kilometre metrics, yes. The K55 has a higher uphill percentage (44.4% vs 39.8%), less flat terrain (14.9% vs 18.7%), and a similar D+/km (40 m/km vs ~39 m/km) -- all of which make the K55 more gradient-concentrated than the K100. The K55 also delivers 85% climbing-or-descending terrain with almost no recovery flat. The dominant terrain feature is Descent #1 at km 35.19: 8.82km dropping 768m (-8.70% average) -- the course's longest and deepest single descent arriving in the second half on fatigued legs. The K55 runs in daylight only (Saturday morning start) and avoids the night-running challenge of the K100, which makes it more accessible in one dimension -- but the gradient profile makes it a serious mountain 55km by any European comparison.

For the 2026 edition (June 20, 2026), the K55 was not sold out -- registration remained open until June 12, 2026 at 15:00, significantly longer than the K100 (which sold out May 19). The K55 typically has remaining capacity when the K100 is full, making it the accessible route into the Krakonosova stovka weekend for runners who missed the flagship distance. Registration is via sportchallenge.cz. For the 2027 edition, monitor sportchallenge.cz in spring; the K100 fills faster, so register early for both.

The K55 loops from Vrchlabi through the Krkonose (Giant Mountains) National Park (KRNAP). The opening climb begins at km 0.09 -- effectively from the start gun -- rising 533m over 6.69km toward the mountain plateau. The route traverses Giant Mountains terrain via switchback forest trails and exposed ridge paths, with three major climbs concentrated in the first 35km and a dominant descent (8.82km, -768m) from km 35 onward. The race passes through sections of the national park that have historically been subject to KRNAP access restrictions (route modifications occurred in past editions due to park management decisions). GPS and route tracking are advisable; official map on k100.ddmvrchlabi.cz/en/trasy/k55.

Prague Airport (PRG) is approximately 128 minutes by car -- the primary hub for international runners. Wroclaw (WRO) and Dresden (DRS) are alternative regional options at comparable drive times. Train and bus connections to Vrchlabi are feasible from Prague, with a last-mile taxi helpful for the final segment. Accommodation in Vrchlabi is limited; ski resort towns Spindleruv Mlyn and Pec pod Snezkou (approximately 30 minutes away) have better availability but book fast in June. The K55 weekend coincides with K100 -- meaning accommodation is under pressure from both races. Late June in Krkonose: 20-25 C in the valley, 5-12 C on the ridge; June is among the wettest months -- pack a waterproof layer.