Chamna Chase

Chamna Chase is held in Richland, Washington, on October 24, 2026. Three trail formats are on the schedule: a half marathon (13.1 miles) at 9:00 AM, a 10K at 9:30 AM, and a 6K (about 3.7 miles) at 10:00 AM. The name points to the Chamna Natural Preserve, and the staggered starts spread the field out along the trails so that faster and slower runners share the day without crowding.

If you are building toward a first trail half marathon, this is a friendly entry point: a 12-week plan with a long run reaching 12 miles and some weekly trail time will get you there. The 10K is a fine option for a hard effort during a bigger training block, and the 6K is short enough for beginners, walkers, and families. Late October in the Tri-Cities is usually dry, so the main challenge is uneven ground rather than mud. Run by feel and enjoy the change from pavement.