SUMMIT: 10,457 feet.
TRAIL: about five miles round-trip. Scaling this snowcapped Sierra Nevada volcano in Lassen Volcanic National Park will test your legs and lungs40 switchbacks lead steadily uphill to the dramatic summit, a gain of 2,000 feet. Climbing season is July to September (or whenever the trail is clear of snow). Kids should be nine or ten.
WHY KIDS LOVE IT
They can throw snowballs near the top in midsummer and check out hydrothermal features like fumaroleshissing holes of vapor and hot gases.
Childs Meadow Resort (888-595-3383, www.childsmeadowresort.com), nine miles southwest of the park, caters to families and has chalets with kitchens, as well as motel units and a café. Rates range from $55 to $240.
Lassen Volcanic National Park: 530-595-4444 www.nps.gov/lavo