Windsor Marathon, Half Marathon, 10K & 5K (CO) Windsor, CO   Oct 4, 2026

The Windsor Marathon, Half Marathon, 10K & 5K starts and ends at The Island at Pelican Lakes in Water Valley in Windsor, Colorado. Enjoy the beautiful 26.2 and 13.1 loop courses as you are on paved trails out to River Bluffs/Kyger Reservoir, up CR 13, finishing through Water Valley onto the Island at Pelican Lakes. The Marathon will take you through a loop in Belmont Ridge before returning to Water Valley. Combination of paved cart and bike paths, the shoulder of CR13 (your big uphill!), a few miles of single track dirt in the Belmont Ridge open space, and a return to sidewalks/paths. A tour of Windsor like no other! 

The 10k route is fast loop course as you travel through Pelican Lakes around Eastman Park, up the hill on 7th street, and finish on the Island at Pelican Lakes. The 5K is a quick out/back course. 

This year’s race benefits Banner MD Anderson Cancer Center.