Wild Yellowstone amazes visitors with its hydrothermal spectacles and free-roaming bison, while Grand Teton thrills with its rugged mountains and icy lakes. Whether you want to gaze at Old Faithful or hike among the peaks, gear up with this top-selling guide to two of the USA's most spectacular national parks.

Detailed Itineraries - explore Yellowstone and Grand Teton with over 20 great itineraries, plus trips to Jackson Hole and Cody, and along the Beartooth Highway

Best Hiking Routes - includes 40 of the most enjoyable hikes around lakes and geysers, up mountains and into the backcountry, with easy-to-use charts and topographic hiking maps

Family Friendly Options - information on education programs, campfire talks, ranger walks and the best hikes for little legs in our special Kids & Pets chapter

Adventure Ideas - covers hiking, rock climbing, mountain biking, rafting, wolf-watching, snowboarding, dogsledding, kayaking, swimming, volunteering and much more

With 2000 hours of in-park research and over 280 miles of trails hiked, our authors offer sound advice for visitors