UB30 Twenty Lakes Challenge
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UB30 Twenty Lakes Challenge

Železná Ruda, Czech Republic August 20, 2026
Difficulty Profile
TERRAIN
CLIMBING
HEAT
REMOTE
1100 km Distance
15000 m Elevation
Gravel Surface
Advanced Difficulty

What to Expect on UB30 Twenty Lakes Challenge

UB30: Twenty Lakes Challenge is a unique self-supported bikepacking event where navigation is as important as endurance. Instead of following a fixed GPX track, riders must visit a series of mandatory waypoints while creating their own route between them, turning the event into a strategic challenge as much as a physical one.

Starting and finishing in Železná Ruda, Czechia, the event offers a 1,100 km flagship route alongside two shorter 800 km options. For the 2026 edition, riders explore the natural and cultural highlights of Šumava, Bavaria, the Berchtesgaden Alps, and Austria’s Salzkammergut region, passing iconic landmarks such as Passau, Hallstatt, Neuschwanstein Castle, and Munich.

Adding another layer to the challenge, participants must complete several mandatory gravel sectors while remaining free to choose their own roads between checkpoints. The result is a different ride for every competitor, where route planning, climbing strategy, and efficient decision-making can be just as decisive as fitness.

UB30 follows a strict self-supported philosophy. Riders are responsible for their own navigation, resupply, accommodation, and mechanical repairs, with no outside assistance permitted. Every choice—from the fastest line to the next waypoint to where to sleep—shapes the overall experience.

Blending strategic navigation, stunning alpine scenery, and the freedom to create your own adventure, UB30: Twenty Lakes Challenge offers a refreshing twist on the traditional bikepacking race and stands out as one of Central Europe’s most original ultra-distance events.

Bike Setup for UB30 Twenty Lakes Challenge

Bike Gravel Bike
Tires 45-50mm Tubeless
Cassette 10-51T
Chainring 38-40T (1x)

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Frequently Asked Questions

How long is UB30 Twenty Lakes Challenge?

UB30 Twenty Lakes Challenge covers 1100 km with 15000 m of climbing along the way — a fairly gentle profile from start to finish.

What bike do I need?

For UB30 Twenty Lakes Challenge, we'd recommend a Gravel Bike — plan on 45-50mm Tubeless tires and a wide-range drivetrain, something like a 38-40T (1x) chainring paired with a 10-51T cassette, to handle the terrain comfortably.

How difficult is it?

UB30 Twenty Lakes Challenge carries an overall difficulty rating of Advanced. The terrain itself is rough, technical terrain for a good stretch of the route, the climbing is steadily rolling, with a healthy amount of climbing, and conditions tend to run mild and generally comfortable.

When does it take place?

UB30 Twenty Lakes Challenge runs on August 20, 2026, placing it firmly in the summer riding season, with long daylight hours, though heat can become a real factor.

What surface is it?

UB30 Twenty Lakes Challenge runs primarily on gravel, and we'd recommend 45-50mm Tubeless tires to handle it comfortably.