The park sits on the edge of Nickajack Lake, an artificial reservoir created by the Tennessee Valley Authority.
Nickajack Cave, adjacent to the park area, serves as a major summer roosting site for an estimated 100,000 endangered gray bats.
The reservoir was formed in 1967 following the completion of the Nickajack Dam, which replaced the aging Hales Bar Dam.
The park acts as a primary entry point for boaters navigating the winding waters of the Tennessee River Gorge area.
Marion County Park is a recreational facility situated directly on the banks of the Nickajack Lake reservoir along the Tennessee River. The park provides direct water access for boating and fishing enthusiasts through a public boat ramp. It features a diverse range of accommodations including 35 campsites with full utility hookups and several primitive tent sites. On-site infrastructure includes covered picnic pavilions, playgrounds, and restrooms to support day-use visitors. The location is known for its proximity to the Hales Bar Dam and Nickajack Cave, a critical habitat for endangered gray bats. The park serves as a common waypoint for travelers on US-41 seeking outdoor recreation in the Tennessee Valley. The site is managed by Marion County and maintains established campgrounds for overnight stays.
The end of the public boat launch ramp at sunset for a view of the river reflecting the surrounding valley hills.
Book your campsite well in advance if planning a weekend stay during the peak spring or autumn months.
Bring polarized sunglasses to better view the aquatic life and river currents from the boat ramp area.
Check local wildlife notices before hiking near the caves, as access may be restricted during bat maternity seasons.
Do not attempt to swim in the main river channel due to strong boat currents and fluctuating water levels.
Campsites often reach full capacity during major holidays; park gates may be restricted during severe flooding events.
Pack out all trash to keep the river environment clean; follow strict noise ordinances at night in camping zones.
