Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk
Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk is a running race on August 8, 2026 in Flagstaff, AZ, with entry fees from $15 to $105.
- Date
- August 8, 2026 (16 days to go)
- Price
- $15–$105
- Sport
- Running
From the Organizer
On August 8th, join Flagstaff's oldest race, and the 2nd oldest half marathon in Arizona sponsored by Kinney. This year we are hosting our 49th annual race on our challenging and breathtakingly beautiful course. Only half marathon participants will get a commemorative finisher's medal that honors Route 66s 100th anniversary. Both 5k or half participants will receive a $34 Sweatvac Hi-Tech colorful long-sleeved shirt, free digital race photos, and admission to the FREE August 7th Fratelli's pre-race pizza party located in their Party Room directly behind their 4th Street restaurant (2120 N Fourth Street). Kid's Dash participants will get a medal. See photos and the last year's race!
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. For many reasons, we do not allow dogs on the course during the race.
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. Elevations range between 6957 ft at the start, to 7731 ft near the 7.5 mile mark! Most of the climbing is done over the first 1.25 miles, so pace yourself. If you are from lower elevations, heed the race director's advice and power walk!!!! You will easily make up the time over the rest of the course! The 5K is also on Observatory Mesa. ALL proceeds benefit BBBSF Mentoring Programs that create and support one-to-one mentoring relationships that ignite the power and promise of youth.
New for this year, we are also hosting a split the pot fundraiser, see details below!
The race is also part of the 22nd 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 before June 14th at https://runsignup.com/Race/AZ/Flagstaff/FlagstaffRunSeries
PARTNER RACE: OCTOBER 10th SOULSTICE MOUNTAIN TRAIL RUN 30K/18K/10K
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
80°
Typical Low
52°
Chance of Rain
44%
Based on US Climate Normals data from Flagstaff Pulliam Ap, 3 mi from the venue.
Host City
About Flagstaff, AZ
Population
76,333
as of 2023
City Elevation
6,888 ft
Nearest Airport
FLG
Flagstaff Pulliam Airport · 4 mi
Major Hub
PHX
Phoenix Sky Harbor International Airport · 123 mi
Time Zone
Mountain Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk, put it on the calendar, and turn “someday” into a start date.
16
Days to train
- Race
- Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk
- Date
- August 8, 2026
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From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
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Plan your trip
Make it a Racecation
Coming from out of town? There's more to Flagstaff than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
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Big Brothers Big Sisters of Flagstaff Dave McKay Memorial Half Marathon and 5K Run/Walk
Aug 8, 2026