Semi-Marathon Halloween Miami

Semi-Marathon Halloween Miami takes place in Miami Beach, Florida, on October 24, 2026, with two distances: a half marathon (13.1 miles) and the Freaky 4-Miler. The event runs on a Halloween theme and a good share of the field turns up in costume.

The course follows the coastline, so the ocean stays in view for most of the way and there is little to distract you from your pacing. That suits a half marathon: settle into an even effort early and let the second half take care of itself. If you are building for one, 12 to 16 weeks with a weekly long run climbing toward 11 or 12 miles and one tempo session will cover it. The 4-miler is the lighter option, short enough to race in costume without regretting the decision, and a fair choice if you would rather join the party than chase a time.