Henrys Lake State Park, Idaho

At a mere 15 miles away from the famous Yellowstone Park, Henry's Lake is a great detour to get away from all the hustle and bustle. Once you've checked out all those geysers and rock formations, kick back and enjoy the sound of the lake lapping against the shores. Take the boat for a spin and angle for every type of fish from cut-bow hybrids to cutthroat trouts. Junior Ranger programs will be an adorable way to trick your niece or nephew into wearing a vest, and guided hikes mean you won't have to trek the trails alone. Whether you're playing horseshoes or just keeping an eye out for sand hill cranes or swans, this is the ultimate place to let loose and relax.