The Crystal Lake Group Campground Lewistown, Montana (406) 566-4000 ProfileThe Crystal Lake Group Campground. RV Park and Campground in Lewistown, Montana Photos RV Campground HQ Default Reviews Map Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API. Enter your locationGet Directions Travel modeDrivingWalkingBicyclingPublic Transport Distance unitsMilesKilometers Get Directions