Dispersed camping options near Garryowen, Montana concentrate along the Bighorn River corridor where fishing access sites double as primitive camping areas. Sites sit at approximately 2,900 feet elevation in a semi-arid region that receives under 15 inches of precipitation annually. Summer temperatures frequently exceed 90°F while winter temperatures can drop below 0°F, creating a narrow camping season from late spring through early fall.
What to do
Fishing opportunities: At Mallards Landing, anglers can access prime Bighorn River fishing spots without competing with larger crowds. "Great access to the river with a little boat ramp," notes one visitor, adding that "heading back behind some local farms is a gem of a fishing spot" with multiple dispersed sites available.
Historical exploration: Camp near Pompeys Pillar FAS, where visitors can explore the only remaining physical evidence of the Lewis and Clark expedition. "Lewis and Clark signed the sandstone here and it's the only location of its kind," explains one camper. The site offers primitive tent camping with road access but minimal facilities.
Horseback riding: BLM lands near Garryowen provide extensive terrain for equestrians. "This is actually a fantastic place to ride Young Horses. There are huge Open Fields. There are also a lot of sandstone Cliffs and deep gullies a very big good assortment of varied Terrain to teach young horses for trail riding," reports one rider who frequently camps in the area.
What campers like
Solitude: Several campers report enjoying the lack of crowds at dispersed sites. At Grant Marsh, campers appreciate the "beautiful and Serene location" with only "seven or eight pull in sights." Another reviewer called it a "quiet little place by the river" with clean vault toilets but no running water.
Riverside locations: Direct water access ranks high among camper preferences. Mallards Landing Fishing Access Site offers "riverside camping quiet beautiful view" according to visitors who enjoy the waterfront setting. One camper specifically mentioned the "wide open group camp spot" with convenient river access.
Dark skies: The minimal development around Garryowen provides excellent stargazing opportunities. Campers frequently mention the night skies and wildlife sounds as highlights. One visitor to Grant Marsh noted enjoying "lots of lovely animal noises" during their overnight stay, while others mention the complete absence of light pollution.
What you should know
Safety considerations: Some fishing access sites have safety concerns after dark. At Two Leggins Fishing Access Area, one reviewer warns it's "not a place to spend the night. Too many bad things happen here at night," despite being a "great place to fish."
Site limitations: Most dispersed camping areas have size restrictions. Grant Marsh campsites accommodate limited vehicle lengths with one camper noting, "I have a 28 ft total length and there were only one or two spots that would work."
Access challenges: Some campgrounds appear accessible on maps but require specific transportation. At Black Canyon Campground, campers should know there is "no road access to any of the campgrounds located inside the canyon. The only road access campsites are downstream of dam in the afterbay."
Navigation difficulties: Finding these primitive sites can be challenging. One camper at Grant Marsh reported, "it was confusing finding it as the pin sends you to a private driveway. The previous turn in the road has the turn off the campsite though."
Tips for camping with families
Recreational activities: Afterbay Campground provides family-friendly open spaces for games and activities. "Within the campground there is a large grass area where people were playing horseshoes, volleyball and spike ball. My family and I enjoyed hanging out in this area, throwing a frisbee around with our dog," reports one family camper.
Swimming spots: Look for camping near water access points for summer cooling options. One Afterbay visitor mentioned, "We also went to the lake that was close by! Enjoyed swimming and playing fetch in the water with our dog."
Bug preparation: Insect protection is essential during summer months. Campers consistently mention mosquito issues throughout the region, with one stating they "did have Bug issues" despite enjoying the riverside location and breeze.
Tips from RVers
Size limitations: Most dispersed sites near Garryowen accommodate smaller RVs only. At Grant Marsh FAS, one RVer noted "Only about seven or eight pull in sights and not very large. I have a 28 ft total length and there were only one or two spots that would work."
Road conditions: Access roads to many sites are unpaved and poorly maintained. Regarding Pompeys Pillar, one visitor warns "The road getting there is horrible it's very washboard and the going is very slow. I do not recommend it for any kind of RV or camp trailer."
Connectivity considerations: Cell service varies significantly between camping areas. Some sites report no service at all, with one camper at Grant Marsh specifically noting "No cellular service whatsoever," while others report limited LTE coverage.
