Banshee Reeks is a Nature Preserve, which ensures that all of the plants, animals, habitats and cultural resources are protected.
Dogs are generally allowed in parks while on a physical leash and under the control of the owner, according to Chapter 612.13 of the Loudoun County Codified Ordinances; however, per Chapter 1092.21, there are certain areas within parks that dogs are prohibited. Please see the ordinance language Opens a New Window. for both 612.13 and 1092.21 for more details.
Contact the Banshee Reeks Nature Preserve for more information.