Hike, backpack, or ride horseback--there's a trail for you.
Yellowstone and Grand Teton National Parks offer the ultimate in natural and geothermal wonders: backcountry lakes, panoramic summits, glacier-carved canyons, steaming geyser basins, and vast meadows teeming with wildlife. Top Trails: Yellowstone and Grand Teton National Parks by experienced outdoors authors Andrew Dean Nystrom and Bradley Mayhew contains 46 "must-do" trips, from Mammoth
46 hikes, ranging from short strolls to multi-day backpacks. Although nicely laid out it's range makes this not a top choice. Better to pick a guide geared to one's goals - day hikes / easy hikes / backpacks.