Upcoming Marathon Events in Idaho, United States

APR
18
2026
2026 Spitfire Ultra Trail Challenge
📍 Menan, United States
🏃‍♂️ Trail
📏 5 km, 12 km, 30 km, 55 km
APR
25
2026
2026 Weiser River 50K Ultra and Relay
📍 Council, United States
🏃‍♂️ Mixed Terrain
📏 50 km
MAY
2
2026
2026 Boise River Marathon
📍 Eagle, United States
🏃‍♂️ Road
📏 3.1 miles, 6.2 miles, 13.1 miles, 26.2 miles