Four Corners Quad Keyah

Four Corners Quad Keyah takes place in Teec Nos Pos, Arizona, on Thursday, December 3, 2026, with a marathon (26.2 miles) and a half marathon (13.1 miles) both starting at 8:30 a.m. The race is held at the Four Corners Monument on the Navajo Nation and is organized by NavajoYES with regional partners. It belongs to the Quad Keyah series, which lets you run marathons and half marathons in Arizona, Utah, Colorado, and New Mexico on consecutive days. Courses use a mix of trails and paved roads, the setting offers a distinctive cultural and scenic experience, and proceeds go to local youth and community wellness programs.

With trail and paved sections, this is not a pure road marathon, so run it for the experience and the setting rather than a fast time. The marathon suits experienced runners, especially those stacking several days of the series, while the half is a reachable goal for anyone with a solid base. Plan a 16-week build for the marathon or 12 weeks for the half, with a weekly long run and some of your miles on dirt roads or trails.