TMC A-Mountain Half-Marathon and 5k

TMC A-Mountain Half Marathon, Four-Miler, and Cox Family Mile

October 22, 2023

2023 Details: We’re coming back to the A, A-Mountain that is.  It looks like we can come back to Downtown, Tucson for our popular TMC A-Mountain Half-Marathon.  We enjoyed the past two years at the Biosphere 2, but we’re working on staging the 2023 edition on the west side of Tucson’s Downtown district, at the super-cool Mercado Annex — see

For all race updates, please visit the race registration page here.

Three Distances to Choose From:

* TMC A-Mountain Half Marathon.  We’ve crafted a beautiful 13.1 mile course that loops up and down A-Mountain and does an out-and-back on the speedy Santa Cruz Riverpath.  The start and finish lines will most likely be on Cushing Street, at the Mercado Annex.

* TMC A-Mountain Four-Miler.  Instead of a 5k this year, we think it would be fun to do a 4-miler up and down A-Mountain.  What do you think?  Email us at for your thoughts on this shorter race distance!

* Cox Free Family Mile and SAR Free FitKidz: our free family one mile will cover an out and back along Cushing and Grande!


  • a souvenir race coaster medal
  • long-sleeve technical shirt
  • age group awards and prize money details announced soon
  • live music 
  • food and drinks and other fun post-race activities

This event is the third and final race of the three-race Gabe Zimmerman Triple Crown.  The TMC A-Mountain Half-Marathon is part of the SAR Running Shop Grand Prix.

Beneficiaries: This will be the third race of the 2023 Gabe Zimmerman Triple Crown.  Proceeds will benefit The Biosphere 2, Team Hoyt Arizona, the BEYOND-Tucson Foundation, and the Southern Arizona Roadrunners.
We will use this race page, email, and our Run Tucson social media channels to provide updated information as we learn more.  For questions or to offer suggestions, contact Randy at

Running Shop SAR Grand Prix: This event will count towards the SAR membership Running Shop Grand Prix. See details at 

Questions? Send ’em to race director Randy Accetta at

More information available here

Saturday, October 21, Registration and Packet Pickup
10:00 am – 1:00 pm, at The Running Shop, 3055 North Campbell Ave

Yes: You can pick up items for friends — please limit the number of packet pickups if it is crowded
Yes: Shirts come in both standard unisex and v-neck cut
Yes: T-shirt sizing first come, first served for all those who registered before September 9th.
Yes: Please follow the Running Shop’s posted public health protocols. 
Yes: It may be crowded, but please be kind to the staff at the Running Shop and the volunteers.
Yes: You can pick up your race schwag in person, then do the event virtually. We’ll post the virtual result link soon!

Sunday, October 22, Race Morning Schedule

5:30 am – 6:15 am Race Day Registration and Packet Pickup at Mercado Annex, 267 S Avenida del Convento, Tucson, AZ

Yes: Shirts come in both standard unisex and v-neck cut
Yes: T-shirt sizing first come, first served 

6:30 AM: TMC A-Mountain Races Starts

8:30 AM: SAR FitKidz Mile and Cox Free Family Mile Start (tentative time)

9:30 AM or so: Awards

10:30 AM: Finish Line Breakdown – please note the four-hour half-marathon time limit.

See the race results for the 2022 edition at

All race results since 2004 can be found at our friends, the Southern Arizona Roadrunners — click here