Saturday, Oct 30, 2021

Castle to River Run

107 Glenclyffe Drive

Garrison, NY 1/2 Marathon, 5K, Kids 1 Mile Costume Fun Run

Registration closes: Thu, Oct 28 @ 11:59PM


The Castle to River Run takes place in the historic Hudson Valley this year on Saturday October 30th!

The 1/2 marathon race takes you through the beautiful Hudson Highlands State Park and down to the Hudson River.

Back for 2021, a return to the historic Osborn Castle! As in past years, the 1/2 marathon course follows the Castle driveway for an up-close look at the Castle. (Please note that permission has been granted only on race day and only for registered runners. Please respect the owner's privacy by following these rules).

The 5K race follows part of Benedict Arnold's escape path down to the Hudson River and back to the Philipstown Recreation Center.

There will be a 1-mile costume fun run that takes place right on the recreation center grounds and enjoys the beautiful fall foliage and picturesque views. Wear your favorite costume for this easy 1-mile run. Sign-up is free prior to race day with an option to buy a race t-shirt for $20. Race day registration for the kids run will be $5.

Runner check-in opens at 7:30am. 1/2 Marathon starts at 9:00am. 5K starts at 9:30am. Kids race begins at 10:30am.

Cut-off Times

There is no cut-off time for the half marathon or 5k.

Course Description

The 1/2 Marathon course is a mix of single track, double track, dirt road, and a few paved sections thrown in for good measure. The single and double track trails are mostly mildly technical with some longer stretches of more challenging technical terrain mixed in. The course rolls with a few big hills here and there. The bulk of the course is runnable.

The 5k loop is flattish with a couple of hills to keep you honest. It's mostly dirt single track that is runnable and not too technical.

Due to the course crossing private property, we won't be providing a map ahead of the race; however, you can view the elevation profiles for each race in the race photos.

Castle Property

Please note that on race day, only registered runners will be allowed on the Castle property and only during the race. Spectators are not allowed. You must stay on the Castle driveway during the race, no wandering off to other parts of the property, please!

If you head out onto the trails for a training run, you must follow the signs and stay off the Castle property.

These are insurance and liability issues. Thank you for understanding.

We have been given special permission to access this property for the race which can be revoked if we don't follow these rules. So please respect them so we can be allowed to use the Castle property again for future races.

Location and Parking

The races start and finish at the Philipstown Recreation Department located at 107 Glenclyffe, Garrison, NY 10524.

Parking will be at the Philipstown Rec. As you enter Glenclyffe, look for volunteers to direct you where to park.

Refund Policy

The 2021 Castle to River race will be held rain or shine. As this is a not-for-profit fundraiser for the Philipstown Recreation Department, we cannot provide refunds to participants. Only in the event that the race is canceled by the organizers (The Friends of the Philipstown Recreation Department) will refunds (less the non-refundable Ultrasignup service fee) be issued.

Finisher Award

All race entrants will receive a finisher’s award t-shirt.

You must sign-up by Friday, October 15th to be guaranteed a shirt in your size.

We will have a limited number of shirts for runners who register after the 15th which will be given out on a first-come-first-serve basis.

Local time: 4:54 AM


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