Here are forty of the best hikes within an hour's drive of the Denver-Boulder area-from open prairies in the plains and old ranches in the foothills to crystal clear mountain streams and lakes. Whether you're in the mood for an easy nature walk, a day-long hike, or an overnighter, this guide offers plenty to choose from:

• Devil's Backbone Loops • Trails for Dinosaur Lovers • Cheyenne Mountain State Park • Hall Ranch • Eldorado Canyon State Park • Spruce Mountain Loop • Twin Sisters Peak • Ouzel Falls and Lake

Each hike features full-color photos; a brief route description; thorough directions to the trailhead and beyond (GPS coordinates included); a detailed, accurate trail map; and at-a-glance information on distance and difficulty level, hiking time, canine compatibility, and fees and permits. Inside you'll also find Green Tips and sidebars on local lore, points of interest, tips for hiking in bear country, and the area's incredible array of wildlife.