A cyclist rides past an area along Sentinel Peak Road that was eroded by heavy rainfall in August. Because the road repairs are not complete, this year’s TMC “A” Half-Marathon will skip “A” mountain. The new route will run from downtown and along a portion of the Santa Cruz River loop.

For seven years, Randy Accetta has produced the TMC “A” Mountain Half-Marathon, a 13.1-mile running race that climbs over 400 feet of Sentinel Peak and circles the summit, with runners passing directly underneath the giant stone “A” that gives the name “A-Mountain.”

In 2016, runners from 21 states plus Canada and Mexico participated in the race, enjoying the beautiful views of the Tucson basin, Accetta said.

The 13.1-mile race scheduled for Oct. 29 has been a regional favorite in large part because of its unique course.

However, a series of intense summer monsoon storms caused flooding and landslide damage to the route, destabilizing the roadbed and forcing the city to make repairs, Accetta said in a prepared statement.

City officials have indicated that the roadway may not be completed by the race date, so they have required that Sentinel Peak not be used for the Oct. 29 race.

Accetta said he’s tried to be philosophical: “It gives us a chance to create a faster course... We’ll still start and finish in Downtown Tucson, but this let’s us add a few more pretty flat miles along the scenic Santa Cruz Riverpath.”

Organizers have added a free beer garden at the finish line, and there will still be four bands on the course, plus post-race children’s activities and food trucks.

Produced by Run Tucson in partnership with the Southern Arizona Roadrunners, the TMC Get Moving Tucson event is the third and final leg of the 2017 Gabe Zimmerman Triple Crown, raising funds for the BEYOND-Tucson Foundation, the Tucson Symphony Orchestra, and Team Hoyt, a wheelchair athlete program for children.

Randy Accetta, is a Mentor-in-Residence at the University of Arizona’s McGuire Center for Entrepreneurship, who also produces some of Tucson’s most popular running races.