San Antonio Marathon

Registration is open to all runners through RunSignup. It stays open until capacity is reached, so it's worth signing up early. There is no race-day registration, and groups of 10 or more are eligible for a discount.

Yes, the course is USATF certified and qualifies for Boston. Keep in mind the rolling terrain means you'll need to earn your time rather than rely on the course to help you.

The time limit is 7 hours, which gives a wide range of pace groups a reasonable window to finish.

The course is a loop with nearly equal gain and loss, making it essentially net-neutral. Expect rolling hills throughout rather than one big climb, with a vertical range of a little under 200 feet between the lowest and highest points.

The December date brings cool mornings in the low-to-mid 40s at the start, warming into the mid-60s by late morning. It's one of the more favorable weather windows for racing in Texas, though you'll want layers for the early miles.

Recent editions have seen around 3,000 finishers, putting it in the mid-size range for a city marathon.

The race starts at Main Plaza in downtown San Antonio at 7:15 AM and finishes at Hemisfair. Staying near the River Walk puts you close to both.