Big Creek Lakes Campground, Colorado (close to Wyoming border): camping here is only open for 3 months out of the year: June, July & August. It's camping at over 9,000ft elevation and requires for you to be extra prepared for snow even in the summer months, bears, mountain lions, mosquitos, aggressive horse flies, leeches, strong winds, thunder storms and altitude sickness. They do provide water which tastes fresh like newly melted snow. You can boat, fish, even hunt at some spots with a permit, hike, and swim at your own risk (can be cold, leeches, snakes). It is truly beautiful up here and the drive up the Poudre river makes it worth it. You can also spend the day rafting down the river or fishing.