Nightmare on N. St. Mary’s Street 5k Run/ Walk 

Nightmare on N. St. Mary’s Street 5k Run/ Walk is held in San Antonio, Texas, on October 31, 2026. One format is offered, a 5K run or walk covering 3.1 miles, starting at 8:30 a.m. As the name says, the race is set on N. St. Mary's Street.

Urban 5Ks reward a controlled opening. The first quarter-mile of a road race is almost always too fast, and on a short course that mistake is expensive, so run the opening block a few seconds slower than target and pick people off later. For preparation, a month of two quality sessions a week covers it: short repeats at 5K effort, plus one steady run of around 40 minutes. Walkers and run-walkers have plenty of room in a 3.1-mile format, and an 8:30 a.m. start means the whole thing is done before lunch.