Actual Course - Thorpe Park Flagstaff, Flagstaff AZ
Saturday, August 8th, 2026
On August 8th, join Flagstaff's oldest race, and the 2nd oldest half marathon in Arizona sponsored by Kinney Construction Services! This year we are hosting our 49th annual race on our challenging and breathtakingly beautiful course.
The Big Brothers Big Sisters of Flagstaff Half Marathon and 5K are walker-friendly events! Those who would like to take their time on our beautiful but challenging half-marathon course, there is a 6 AM start. While you will receive a chip time and finisher's medal, you will not be eligible for age division awards.
Our beautiful course starts at Thorpe Park and climbs the steep urban trail onto Observatory Mesa (where astronomers discovered Pluto) and follows dirt roads on with spectacular views of the San Francisco Peaks.
The race is also part of the 22nd annual soon to be announced Flagstaff Running Series value package of five of Flagstaff's most iconic foot races.
For more details and to register for the race, visit BBBS Memorial Run/Walk.
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