Green Lane Park offers fishing, boating, picnicking, horseback riding trails, hiking trails, mountain biking trails, family camping, equestrian camping, tennis, playgrounds, cross-country skiing, ice skating, and ice fishing. In addition there is the Nature Center with environmental classes.
The park consists of over 3400 acres and three bodies of water totaling 870 acres. Four recreational activity sites within the park offer a variety of uses. The Deep Creek Lake area offers overnight campsites for family camping and the many recreational facilities, such as two tennis courts and two playgrounds and an enclosed pavilion. The Reservoir section at Hill Road has electric rental boats. Rental row boats and private boat racks are available at the Walt Road Launch and Deep Creek Lake. All three of these sites have grills, large picnic areas, fishing and many open fields for a variety of active sports. There are several miles of nature trails that attract hikers, mountain bikers and equestrians from far and wide to enjoy the natural beauty of the seasons. Wintertime sees the heartier sports of ice skating, cross-country skiing, sledding and ice fishing.
Green Lane Park is the home of the Montgomery County's Environmental Education Center, where year round programs for both children and adults are conducted by the Environmental Education Staff.
Leashed pets are welcome in the park, but are restricted from entering any of the creek or lake waters and the campground.