If you are heading to Mary Gray this weekend, you may also want to check-out Shrader-Weaver Woods near Bentonville.
The Shrader-Weaver Woods is amazingly tranquil especially in winter. This hike is one I have done many times and I enjoy the serenity it offers.
The parking area is right off of the road and easy to miss if there is snow on the ground. If you decide to try this hike during the summer, make sure you have ample bug repellent on because the back of the woods is a wet woods with a seep. Vegetation includes your standard water loving plants such as white oaks and skunk cabbage.