Harlon Block Half Marathon
Race Day Weather
Warm start, rising heat challenge
Runners will face a starting temperature of 65°F, climbing to 82°F by race end. With humidity around 70% and a light headwind at 11 mph, hydration is crucial. Adjusting pace early is advisable to manage the heat as conditions become more challenging later in the race.
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Race Info
The Harlon Block Half Marathon debuts in Weslaco, Texas on November 8, 2026, starting and finishing at Harlon Block Sports Complex. The race is named for Harlon Block, a Weslaco native and Marine who helped raise the flag atop Mount Suribachi during the Battle of Iwo Jima in 1945. Alongside the standard half marathon, runners can enter the Harlon Block Memorial Ruck, a weighted-pack division on the same course. Proceeds from both events go toward a permanent memorial statue for Block that broke ground in Weslaco in February 2026.
