Flagstaff Marathon

The Flagstaff Marathon in October 2026 offers a relatively flat to gently rolling course at high elevation, ranging between 2,438 and 2,621 meters above sea level, which means altitude will be a significant factor in your effort and pacing strategy. Road running conditions mean you can expect consistent footing and predictable terrain, though the elevation should take precedence over course difficulty in your training and race planning. At this altitude, expect slower times than sea level equivalents and plan your breathing and fueling accordingly, as the thin air will affect your aerobic capacity regardless of your fitness level. October in Flagstaff brings cooler temperatures, which can work in your favor for a full marathon effort, though you'll want to check weather conditions closer to race day. Visit the race website for details on course support, logistics, and any mandatory pace requirements before committing to this event.