Castle to River Run

Castle to River Run

The Castle to River Run in Garrison, NY on October 25, 2026 includes multiple foot races and serves as a fundraiser for The Friends of Philipstown Recreation, a 501c3 organization that supports recreational programs and facilities in Cold Spring, Garrison, Nelsonville and Continental Village, NY.

Distances

• Half marathon through Hudson Highlands State Park and past Osborn Castle.
• 5K loop along trails toward the Hudson River and back to the Philipstown Recreation Center.
• Kids fun run 3/4 mile on the recreation center grounds.

The half marathon course mixes single track, double track, dirt road and some pavement. Trails are mostly mildly technical with some more challenging sections and several hills; most of the course is runnable. The 5K is a flattish loop of dirt single trail and grass with a couple of hills. Because the course uses private property, a full map is not provided before race day; elevation profiles are available in the race photos.

Only registered participants are allowed on the Castle and Forest Farm Road sections during the race; spectators are prohibited on those sections. Runners must stay on the Castle driveway while on private property. There is one aid station for the half marathon that runners will pass twice; it will offer water, sports drink and basic food items but not gels.

Races start and finish at the Philipstown Recreation Department, 107 Glenclyffe, Garrison, NY. Parking is at the recreation center. Race shirts are provided to entrants; signing up by October 4 guarantees a shirt size. Registration closes on October 24, 2026. Entry fees vary by date; discounts of 20 percent apply for active military, veterans and first responders. As a nonprofit fundraiser, refunds are not issued except if the organizers cancel the event, and any refund would exclude the nonrefundable Ultrasignup service fee. Visit the organization's website for the most recent information.

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