Subject
Trails
Outdoor recreation
5
National parks and reserves
4
Hiking
3
Ozark Trail (Mo. and Ark.)
3
Cross-country skiing
2
Grasslands
2
Mark Twain National Forest (Mo.)
2
Santa Fe National Historic Trail
2
Spruce Knob-Seneca Rocks National Recreation Area (W. Va.)
2
Wayne National Forest (Ohio)
2
Backpacking
1
Black Elk Wilderness (S.D.) Recreational use
1
Black Hills National Forest (S.D. and Wyo.) Recreational use
1
Chequamegon National Forest (Wis.)
1
Comanche National Grassland (Colo.)
1
Comanche National Grassland (Colo.) Antiquities
1
Dixie National Forest (Utah)
1
Forest roads
1
Hickory Ridge Trail (Ind.)
1
Hoosier National Forest (Ind.)
1
Nicolet National Forest (Wis.)
1
Norbeck Wildlife Preserve (S.D.) Recreational use
1
Ozark National Forest (Ark.)
1
Picnic grounds
1
Pike National Forest (Colo.)
1
Saint Francis National Forest (Ark.)
1