At 13,063 feet, Wheeler—near the Utah line, about five hours from Salt Lake City—is a smorgasbord of activity, little of it human. The Summit Trail is an 8.2-mile round-trip that rises 2,900 feet above a glacier with panoramas of Great Basin National Park. Get personal with screeching yellow-bellied marmots and ringtail cats, and be ready for the scree and likely snow in the final two miles. Check out the Lehman Caves, gather pine nuts, fish for cutthroat trout, and hike into the antediluvian bristlecone pines, then pitch your tent at Wheeler Peak Campground ($12; nps.gov/grba), a cone's throw from the trailhead.