The Group Campground at Cuyuna Country State Recreation Area holds 25 people on one primitive site at the edge of Portsmouth Mine Lake, Minnesota's deepest inland lake at 450 feet. The site sits within reclaimed iron‑range country where flooded open‑pit mines and red‑soil hills have become a world‑class mountain‑bike destination. Expect vault toilets, fire rings, and no showers; fees run $17–22 per night.
This is a reservable group campsite within Cuyuna Country State Recreation Area offering rustic (primitive) camping. Recreational vehicles and camper vans are allowed in state forest campgrounds, but utility hookups are not available at campsites.
Historical Significance
The site sits in the former Cuyuna iron range, where open‑pit mines operated until mid‑century and then filled with groundwater as the district shut down. Vegetation reclaimed the landscape, and the state turned the flooded pits and mine land into a recreation area. One of Minnesota's clearer examples of successful post‑mining conversion to public use.Weather and SeasonsSummer gives you reliably warm weather. Daytime highs typically in the mid‑70s to mid‑80s°F, nights in the 50s–60s. And full access to Cuyuna's clear mine lakes and mountain‑bike trails. Swimming, boating, shore‑fishing, and high‑energy group rides peak from June through August, along with the busiest trail and lake use. Book early and bring bug spray and sun protection. Spring and fall offer milder temperatures, quieter trails, and fall color, with the site open roughly late April through late October. Winter camping isn't offered; exact opening and closing dates shift year to year, so check the DNR or campground webpage before you plan.
Natural Features and SceneryDeep, clear mine lakes fill former open pits, their steep forested banks dropping to aquamarine water. Portsmouth Mine Lake anchors the northwest shore, surrounded by rolling pine and hardwood forest on iron‑rich soils at 1,250 feet elevation. The reclaimed mining landscape creates unusual sightlines: wooded ridges, lakeside bluffs, and glimpses of old mining remnants woven into the regrowth. Anglers and snorkelers report pike and other sport fish in the lakes. The whole area is compact and trail‑threaded, with quick access to water and singletrack from almost anywhere.
Geological RegionReclaimed open‑pit iron mining district (Cuyuna iron range) with deep mine lakes, red iron‑rich soils, and rolling pine and hardwood forest.
Scenic ViewsThe group campground is part of the Portsmouth area on Portsmouth Mine Lake; campground areas and nearby facilities commonly offer lake views or short walks to water and beach access.