Book excerpt: Frommer's Rocky Mountain National Park offers the very best practical information and candid tips to ensure a terrific visit to the park, whether you are just passing through for a few hours or spending a few weeks. Seasoned travel writers Don and Barbara Laine offer the best hikes in the park for all levels, from an easy walk through the wildflowers, pines and fir trees of the Emerald Lake Trail to the strenuous East Longs Peak Trail, which climbs about 5,000 feet. The authors also cover a range of other activities in the park- fishing, skiing, horseback riding and biking-among others. The guides are packed with honest tips for seeing all the parks treasures. Plus, a fully illustrated nature guide to help you identify the park's flora and fauna.