Welcome to Diamond Mountain Triathlon, hosted in the scenic heart of Harriman State Park. The course features a calm lake swim, a rolling 15-mile bike loop with spectacular views, and a fun lakeside run to the finish. The event is beginner-friendly while still rewarding strong competitors. Rain or shine, we race — and we’re excited to share the course with you. What the event offers: Relaxed and convenient midday start Police-controlled intersections Course signage and volunteer support Race photographers Free public parking Junior athletes race Duathlon with adults for free Junior athletes race Triathlon for free and may have a separate start Finisher medals for all participants Awards for Top-3 Men & Women in both Triathlon and Duathlon Overall Adult Triathlon Winners are getting champion suit: Free jersey for Triathlon participants: Duathlon participants are getting running jersey Follow our race at @Diamond_Mountain_Races Race Schedule Date: Sunday, September 20 Start Time: 12:00 P
Hotels Near This Race
Find accommodation close to the start line in Stony Point, NY. Sorted by distance from the race venue. Book early — race weekend hotels fill fast.
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Race Travel Insurance
Don't forget travel insurance for September 20.
You've trained for months and booked a trip to Stony Point, NY.
A pre-race injury, a delayed flight, or a family emergency can derail the whole thing.
Travel insurance can help cover your race entry fee, hotel, and flights if you can't make it,
and may cover medical costs if something goes wrong on the course. Plans typically only run
5-7% of your total trip cost — and running events are covered under standard plans with no
additional coverage needed.
Trip cancellation up to 100% of prepaid costs
Running events covered under standard plans — no add-ons needed
Trip interruption up to 150% of non-refundable costs
