rock climbing challenges, to traditional developed-site camping. Canoeing, hunting, trapping, fishing, and wildlife viewing are also common uses. Campgrounds The following are developed campgrounds in the forest: Bear Heaven Campground Big Bend Campground Big Rock Campground Bird Run Campground Bishop Knob Campground Blue Bend Recreation Area and Campground Cranberry Campground Cranberry River Sites Day Run Campground Gatewood Group Camp Horseshoe Campground Island Campground Jess Judy Group Campground Lake Sherwood Recreation Area and Campground Laurel Fork Campground Middle Mountain Cabins Pocahontas Campground Red Creek Campground Seneca Shadows Campground Spruce Knob Lake Campground Stuart Campground Stuart Group Campground Summit Lake Campground Tea Creek Campground Williams River sites Commercial resources The forest administration maintains wildlife and timber programs aimed at the responsible management of a mixed-age forest. About 81 percent of the total forest area is closed canopy forest over 60 years of age. The tree species most valuable for timber and wildlife food in the Monongahela National Forest are black cherry and oaks. The forest's commercial timber sale program averages 30 mbf (thousand board feet) of timber sold per year with a yearly average value of $7.5 million. Various cutting techniques are used, from cutting single trees to clearcutting blocks up to in size. Regeneration cuts (clear-cuts or other treatments designed to start a new timber stand) occur on approximately yearly out of the more than forest total. Mineral resources located in the Monongahela National Forest include coal, gas, limestone, and gravel. Sheep and cattle grazing occurs on about . Receipts for timber, grazing, land uses, minerals, and recreation use averaged $4,840,466 annually between FY92 and FY96, and 25% of that (an average of $1,210,116 per year) was returned to counties that include Monongahela National Forest lands. This money is intended for use by local schools and roads. The remaining 75% each year is returned to the U.S. Treasury. Areas of interest within the Monongahela National Forest Spruce Knob–Seneca Rocks National Recreation Area Spruce Knob Seneca Rocks River Knobs Spruce Knobs lake Sites Homestead Smoke Hole Canyon U.S. Wilderness Areas Big Draft Wilderness, Cranberry Wilderness, Dolly Sods Wilderness, Laurel Fork North Wilderness, Laurel Fork South Wilderness, Otter Creek Wilderness, Roaring Plains West Wilderness, Mount Porte Crayon Spice Run Wilderness, Registered National Natural Landmarks Big Run Bog Blister Run Swamp Canaan Valley Cranberry Glades Botanical Area Fisher Spring Run Bog Gaudineer Scenic Area Germany Valley Karst Area Shavers Mountain Spruce-Hemlock Stand Sinnett-Thorn Mountain