Islamorada Half Marathon

Islamorada Half Marathon is held on the island of Islamorada, in the Florida Keys, on December 12, 2026. Three distances share the day: a half marathon (13.1 miles), a 10K and a 5K. The course follows the water and crosses several of the bridges and causeways that define this stretch of the Keys, with open ocean views for most of the way.

Road miles beside the water make the half a reasonable target for a first attempt at the distance, and a fair place to chase a personal best if you have run one before. Plan on a 12 to 16 week build with a weekly long run climbing toward 10 or 11 miles. The 10K and 5K need much less: a few weeks of steady running plus one faster session a week is enough, and the shorter formats leave you free to take in the bridges.