Cottonwood Campground is a nice small 4 site campground. While the campground is near Canyon Ferry Lake it is not on the lake. Boat access to the lake is possible from a boat launch in a day use area past the campground, the launch is to a side channel of the Missouri River. While the campground is listed as a dispersed camping campground I would not call this a dispersed camping area. The site has four established campsites with picnic tables and metal fire rings. These four campsite take up the entire area and does not leave on a place to "disperse camp". The site has a ADA Vault toilet and one of the four campsite is an ADA site with a large concrete pad. One thing that is nice about this campground is that you need to know it's here, their is no signage along Highway US 12/287 to indicate that their is a campground here. The site has no water or trash service so come prepared. No fee is charged for the site.