From Memorial Day to Labor Day, all types of interpretive programs are conducted by the park interpreter. These programs include hiking, visiting unique geologic and historical features in the park, vernal pool programs, wildlife and birdwatching walks. Check the bulletin boards in the parking lots, local newspapers or call the park for upcoming events.

The trails at Leominster State Forest are extensive and offer a wide variety of terrains. For hikers, The Midstate Trail, a 95-mile long-distance trail that runs from Rhode Island to the New Hampshire border, passes through the western edge of the park. A popular day hike along the Midstate Trail begins at Redemption Rock on Rte 140 in Princeton, and heads north over a scenic ridgeline which includes Crow Hill Ledges. Heading south from Redemption Rock it is a pretty hike over to the summit of Mount Wachusett State Reservation, another DCR managed property. Wachusett Greenways, a local land preservation group, offers a variety of guided hikes and trail maintenance days in Princeton, Sterling and surrounding towns throughout the year.

The terrain available to mountain bikers ranges from rolling unpaved fire roads to more technical, single track, multi-use trails. Hiking trails are off limits to bikers. New England Mountain Bike Association has been an ardent supporter of the trail system here. The Wachusett Chapter of NEMBA generally runs four trail maintenance days, two in the spring and two in the fall. All are welcome to join in the fun and help to improve the trails at the park. Another popular and unique recreational use of LSF is rock-climbing at Crow Hill Ledges. Permits are required (no fee) and are available at the park HQ's or at the contact station between Memorial Day and Labor Day.

The swimming beach at Crow Hill Pond is located next to two beautiful picnic areas that also provide picnic tables, grills and a modern bathhouse. DCR lifeguards are on duty from mid-June until Labor Day. All other ponds in the park are off limits to swimming. Kayakers, canoeists and fishing enthusiasts enjoy using Paradise Pond for their recreational pursuits. The numerous islands, inlets and coves provide great warm water fishing and countless exploring opportunities. Paradise Pond is easily accessible off Rte. 31, where several put-ins are available. Crow Hill Pond (swimming beach side) is stocked with trout several times a year by Mass Fisheries and Wildlife. Hunting is also allowed in the park; all regulations apply. Winter recreation includes cross country skiing, snow shoeing and snowmobiling. Snow mobiling is limited to the unpaved roads and the multi use trails. All other motorized uses are prohibited.