Access/Restrictions - Consult your Maryland Guide to Fishing and Crabbing for length and possession limits on black bass, sunfish, crappie, catfish and tiger muskies. There is a statewide closed season on black bass in nontidal Maryland waters from March 1 through June 15. Catch-and-return angling for largemouth bass is permitted during the closure.

Seneca Creek State Park closes daily at sunset. To find out when it opens, call the State Park (see below). A daily use park fee is required to enter the park. There is a self-launch kayak and canoe ramp accessible from Seneca Creek Road. The Clopper Lake Boat Center offers a variety of vessels that may be rented hourly or daily. The Boat Center is open from May through Labor Day.

History - Clopper Lake is a 90-acre impoundment on Long Draught Branch within Seneca Creek State Park. The dam was built in 1975 for recreation and flood control. Prior to 1986, statewide black bass regulations applied to Clopper Lake. From 1986 through 1997, Clopper Lake largemouth bass were managed under a 10-inch minimum size regulation as a result of an over-abundance of small bass. The intent of the regulation was for anglers to reduce the number of small bass. Harvest of the small bass would reduce competition and increase growth rates among the remaining bass. Unfortunately, fishing pressure was relatively low and catch-and-return black bass fishing had become popular among bass anglers. The thought of harvesting small bass was not popular even if it could improve the bass population in Clopper Lake. In 1998, the black bass regulation in Clopper Lake was changed back to statewide regulations (5 bass/day, >12 inches).