Hiking

Moderate

Coastal Trail. This gorgeous 70-mile trail, much of it along dramatic bluffs high above the crashing surf, can be tackled in both short, relatively easy sections and longer, strenuous spans that entail backcountry overnight camping. Here are some of the most alluring smaller sections, listed in order from north to south, which are accessible at well-marked trailheads. The moderate-to-difficult DeMartin section (accessed from mile marker 15.6 on U.S. 101) leads south past 6 miles of old-growth redwoods and through sweeping prairie. It connects with the moderate 5½-mile-long Klamath section, which proceeds south from Wilson Creek Picnic Area to Klamath River Overlook, with a short detour to Hidden Beach and its tide pools, providing coastal views and whale-watching opportunities. If you're up for a real workout, hike the brutally difficult but stunning Flint Ridge section (accessed from the Old Douglas Memorial Bridge Site on Klamath Beach Rd.), with its 4½ miles of steep grades and numerous switchbacks past Marshall Pond and through stands of old-growth redwoods. There are additional spans at the northern and southern ends of the park. Moderate. Klamath, California, 95548.

Difficult

West Ridge–Friendship Ridge–James Irvine Loop. For a long, moderately strenuous trek, try this 12½-mile loop. The difficult West Ridge segment passes redwoods looming above a carpet of ferns. The slightly less taxing Friendship Ridge portion slopes down toward the coast through forests of spruce and hemlock and accesses iconic Fern Canyon. And the moderate James Irvine Trail portion winds along a small creek and amid dense stands of redwoods. Each of these segments can be hiked separately, a good plan if you're seeking a shorter and less intensive trek. Difficult. Orick, California, 95555.