Thousand Islands Half Marathon / 10K / 5K

The Thousand Islands Half Marathon / 10K / 5K is being listed for Saturday, May 15, 2027 in Clayton as a tentative date based on the 2026 race weekend and its mid-May North Country cadence. With three road-race distances, the event can serve first-time 5K participants, intermediate runners, and athletes targeting a half marathon in the Thousand Islands region. Confluence Running is publishing the projected date now so runners can build it into spring training and travel plans. The organizer has not yet confirmed the 2027 edition, so course routes, start times, registration, packet pickup, aid stations, awards, and race-day logistics may change.

The Thousand Islands race weekend in Clayton offers half marathon, 10K and 5K distances in the heart of the North Country.

Projected planning date for 2028; organizer confirmation is still pending.