MAKC Preserves Here are the seven preserves and our library and education center managed by the MAKC.  Preserve Location Open Management Access Contact Bear Cave Natural Area Western PA 4/15 to 10/15 MAKC Lease Permit Required * KimMAKC@aol.com Billy Clay Nature Preserve Central WV 4/1 to 12/31 MAKC Owned Permit Required BillyClayPits@karst.org Cleversburg Sink Central PA All Year MAKC Lease (Managed by Franklin County Grotto) Open (Gated) Cleversburg@karst.orgcleversburg@karst.org Danielson Center Central PA By appointment after 5/15/10 MAKC Owned Open by appointment archivist@karst.org Hall Cave Central PA All Year MAKC Owned Open HallCave@karst.org Harlansburg Cave Western PA All Year MAKC Lease Project Trips Only (Gated) HarlansburgCave@karst.org Hesston Cave Central PA All Year MAKC Lease Project Trips Only (Gated) HesstonCave@karst.org Trout Run Woods Western PA 4/15 to 10/15 MAKC Lease Open  TroutRunWoodsCaves@karst.org   Check out our calendar page for dates of upcoming project trips. All cavers are welcome on these trips which offer an opportunity to visit these caves while helping with important project work.   * Members of clubs associated with NSS do not need a written permit for the Bear Cave Natural Area, but should notify the MAKC in advance of any trip.