20. Juni 2026: O-SEE Open Water Race
11.-12. Juli 2026: O-SEE Backyard Ultra
14.–16. August 2026: XTERRA O-SEE Challenge
16. August 2026: O-SEE X’Kids Challenge
17. Oktober 2026: XTERRA O-SEE Ultra Trail
18. Oktober 2026: O-SEE CaniCross
24. Oktober 2026: Lusatian International Race Walking Meeting