Shenandoah National Park in September

October brings the crowds and the colors. Fall foliage peaks around October 15th on the ridgeline, then moves downhill over the next two weeks. Expect bumper-to-bumper traffic on Skyline Drive and full parking lots at popular trailheads. But the views are worth the hassle. Spring (April through June) offers wildflowers, fewer people, and perfect hiking weather. Dogwood and redbud trees bloom in late April, while mountain laurel shows off in May. Just watch for late season storms that can dump snow above 3,000 feet. Summer gets hot and humid in the valleys, but the ridgeline stays comfortable. Thunderstorms roll through most afternoons, so start your hikes early. Swimming holes along the streams provide relief, though the water stays cold even in July. Winter transforms the park into something completely different. Skyline Drive closes during ice storms, but when it's open, you'll have the place mostly to yourself. Some facilities shut down, but the views stretch farther without leaves on the trees.