XTERRA O-SEE Challenge Olbersdorf — Edition 2025

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15 Aug 2025 — 17 Aug 2025 Finished

Overview

The 25th O-SEE Challenge 2025 gathered around 1,500 cross-triathletes from around the world at Olbersdorfer See. Three days of competition from the XTERRA German Championship to the O-SEE Classic and the X'Kids — the anniversary edition underscored the event's position as Germany's most important cross-triathlon.

25th O-SEE Challenge 2025 — Anniversary

The 25th edition of the O-SEE Challenge in August 2025 marked an anniversary: the event has been held at Olbersdorfer See since 2000, and as part of the XTERRA World Series since 2004. International cross-triathlon stars competed against athletes from the region in all distances — from the X'Kids children's format to the XTERRA German Championship.

The unique course in the Zittauer Gebirge Nature Park, with swimming in the clear lake, mountain bike singletracks through sandstone forests, and trail running along rock formations, once again confirmed the reputation of the O-SEE Challenge as Germany's most scenic and technically demanding cross-triathlon.

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