Siesta Half Marathon

Siesta Half Marathon returns to Mission County Park in San Antonio, Texas, on April 25, 2027. The half marathon (13.1 miles) starts at 7:31 a.m. on a certified out-and-back along the scenic southern stretch of the River Walk, with a 10K and a 5K following at 8:15 a.m. and a 0.05K fun run rounding out the program. Everything is chip-timed, and the event forms part of the Texas Hill Country Series Challenge.

Flat and fast is the honest description here, and the out-and-back layout means you meet the rest of the field head-on, which adds a tactical edge on the return leg. Race it as a pace exercise: even splits, nothing heroic in the first three miles. Afterward the Fiesta-themed party takes over with a costume contest, pinatas, mariachis and pan dulce, and entries support Marrow Match and the San Antonio Young Marines.