Actual Course - Thorpe Park Flagstaff, Flagstaff AZ
Saturday, August 9th, 2025
On August 9th, join the 2nd oldest half marathon in Arizona sponsored by Kinney Construction Services! This year we are hosting our 48th annual race on our challenging and breathtakingly beautiful course. All Half Marathon participants will get a commemorative finisher's medal similar to last year's popular design.
The race is also part of the 21st annual Flagstaff Running Series value package of five of Flagstaff's most iconic foot races. You can save big on the Series package of races by registering for one-stop shopping at Flagstaff Running Series.
Be a Big FUNdraiser - GET YOUR ENTRY FEE REFUNDED by creating a donations page. When you go through the registration process and reach the donation page, choose the "Become a BIG Fundraiser" button.
11 AM finishing time cut-off! This gives competitive runners 3 hours and 30 minutes to finish the race. If you need extra time, we offer a 6 AM early start with finisher medals awarded, but you will not be eligible for age division awards.
You can register in person at the Run Flagstaff packet pickup on Thursday August 7th, 2:30 to 5:30 PM at 204 East Route 66, or the night before the race August 8th, at Grand Canyon Adventures 5:30 to 7:30 PM (400 South Malapais Lane).
Our beautiful course starts at Thorpe Park and climbs the steep urban trail onto Observatory Mesa (where astronomers discovered Pluto) and follows dirt roads with spectacular views of the San Francisco Peaks.
AID STATIONS: Mile 1 (before 5K/Half Marathon split: Water), Mile 2 (gate at top of urban trail: water and Gatorade), Mile 4.5 (Junction of Pipeline and Forest Road: Water and Gatorade), Mile 6 (used to be halfway: Water, Gatorade, M&Ms), Mile 8 (Haag's Hideaway: Water), Mile 10.1 (Same as 4.5 on return: Water, Gatorade and M&Ms), Mile 11 (same as Mile 2 on return: Water), Mile 12 (Same as mile 1 on return: Water).
August 7th: Early Packet Pick up at Run Flagstaff, 2:30 PM to 5:30 PM, 204 West Historic Route 66, Flagstaff.
August 8th FRATELLI'S PIZZA PARTY PACKET PICK UP: All registered runners get a free pizza party from 5:30 to 7:30 PM at Grand Canyon Adventures. Friends and families can make a $10 donation to join the party.
RACE DAY PARKING AROUND THORPE PARK PICNIC RAMADA: PLEASE DO NOT PARK AT THORPE PARK: We must leave this open for those that use the Adult Center and the tennis courts. You can park along any of the residential streets, Aspen, Birch, or Cherry Street that lead to the park.
August 9th Estimated start of Medal Awards and Photos: 5K Fun Run 8:30 AM, Half Marathon 10:00 AM with various awards based on age divisions.
Because the race is put on by the Big Brothers Big Sisters of Flagstaff volunteer board of directions, 100% of the proceeds benefit the 501c3 non-profit's mentoring programs, we have a no refund policy.
For more details and to register, visit the race link: Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk.
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