Ninja 5K, 10K, & 13.1M at Stillwater, OK (31) 2026

The Ninja 5K, 10K, and half marathon in Stillwater begins at 8:00 AM from Shelter #3 at Boomer Lake Park, located beside the Boomer Park Splash Pad on the west side of the lake. This is a small-format road race with multiple distance options on repeated out-and-back courses. Runners can select a single 5K loop or a longer morning by completing multiple repeats. All participants register in advance via RunSignup; there is no race-day registration at the park. Packet pickup is available for a brief period before the race start. The 5K course is one 3.11-mile out-and-back. The 10K course repeats this same route twice. The half marathon uses a separate 3.28-mile out-and-back course completed four times, and the marathon option repeats it eight times, all within a six-hour limit. Finishers receive medals, and awards are presented. Best costumes are judged, and runners can accumulate series points, contributing to a recurring club-race atmosphere rather than a standalone event.