Dig your toes into the sand at North Beach, part of Bear Lake State Park in St. Charles, Idaho. The 1.5-mile-long, day-use swimming beach is perfect for an afternoon of splashing around.
In the nearby Cache National Forest, Minnetonka Cave conceals nine immense rooms with stalactites, stalagmites, and banded travertine. Guided tours run every half hour and jackets are encouraged, as it’s a cool 40 degrees inside.
Farther north, the Bear Lake National Wildlife Refuge offers a protected habitat for waterfowl and other migratory birds. In the summertime, you can spot fluttering sandhill cranes from the trails.