Twin Lakes Campground
Hartwell Lake · South Carolina · 100 sites
Photos: US Army Corps of Engineers via Recreation.gov
Overview
Twin Lakes Campground is a US Army Corps of Engineers campground in Hartwell Lake, South Carolina, with 100 sites. Very shady: nearly every site is under trees. T-Mobile, Verizon and AT&T report coverage at every site.
97 of 100 sites shaded
2 of 100 sites in full sun
4 of 100 sites with clear sky
Map of the campground
Every site from the Recreation.gov listing. Choose a layer to see it across the campground; tap a site to open it in Roam.
Layers
More in Roam Premium
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Questions
Which sites at Twin Lakes Campground are the shadiest?
Nearly all of them. 97 of 100 sites at Twin Lakes Campground have good shade from the trees, including from the hot afternoon sun.
See the tree canopy in RoamWhich sites at Twin Lakes Campground get the most sun?
Only a few. 2 of 100 sites are truly sunny and 1 more gets some sun; the rest are shaded.
See the tree canopy in RoamWill Starlink work at Twin Lakes Campground?
Only at a few. About 4 of 100 sites have a clear gap in the trees for Starlink and 3 a partial one; most sit under tall trees. Satellite texting on a phone needs less open sky, but still works best from the most open spot you can find. This is our estimate from tree heights — check with the Starlink app's obstruction check when you arrive.
See the tree canopy in RoamWhich sites at Twin Lakes Campground are the most level?
11 of 100 sites are flat, and 16 more have a gentle slope most RVs can level with blocks; 73 are steeper, better for tents. Sites that take RVs or trailers fit rigs up to 62 ft.
See the slope at each site in RoamDoes Twin Lakes Campground have cell service?
Yes. T-Mobile, Verizon and AT&T all report coverage at every site at Twin Lakes Campground. That's the coverage each carrier reports to the FCC, not a measured signal, so under trees or below a ridge it can be weaker.
See the coverage map in RoamWhen is the best time to see fall color at Twin Lakes Campground?
October. In a typical year the leaves around Twin Lakes Campground are at their best in mid to late October, though any one fall can run a week or two early or late. Much of the forest here stays green, so expect color in patches. Roam’s fall foliage map shows how far the color has come this week, free every September through November.
See this week’s fall color in RoamWhat’s the weather like at Twin Lakes Campground in October?
In October, expect highs around 73°F and lows around 51°F, with about 3.5 inches of rain over the month. Every month’s averages are in Roam Premium.
Open Twin Lakes in RoamCampground facts
- Sites
- 100
- Kinds
- 100 for RVs or trailers
- Hookups
- 100 with electric
- Longest rig
- 62 ft
- Accessible
- 1 site
- Elevation
- 663–723 ft
- Every site
- Drive-in · Pets allowed · Check-in 3 PM, check-out 2 PM
- Managed by
- US Army Corps of Engineers
- Booking
- Reserve on Recreation.gov
How we know Sources and limits
Shade, sun and Starlink are our estimates from Meta and the World Resources Institute’s canopy-height model (about 2 m pixels, from satellite imagery calibrated with space lidar; CC BY 4.0). From 2 m above each site we trace 72 lines out to 60 m and note the tallest tree in each direction. Shade counts trees overhead, the canopy within 30 m and how much of the afternoon sky is blocked. Sun counts how open the southern sky is. Starlink needs open sky above 35°, with the northern half counted twice because US dishes tilt north, and we keep the best spot within 8 m of the site’s post. The model sees tree heights only, not trunks, buildings or hills, so check with the Starlink app when you arrive.
Slope is the ground at each site’s post over about 4 m, from USGS 3DEP 1 m lidar: level under 2%, gentle to 4% (most rigs level on blocks), sloped to 8% (fine for a tent), steep beyond.
Cell coverage is from the FCC Broadband Data Collection (carrier filings as downloaded May 2026): each site is tested against each carrier’s modelled outdoor 4G/5G coverage. It is what the carriers report, not a measured signal.
Fall color is the typical peak from NASA’s MODIS satellite record of when leaves change (2001–2023), limited to deciduous and mixed forest with USGS land cover (NLCD), calibrated to the USA National Phenology Network’s ground reports of colored leaves (CC BY 4.0). It is an average of many autumns, so the page gives a window, not a date.
Weather is NOAA’s 1991–2020 climate normals for the campground. Sites and facts are from Recreation.gov’s open data (July 2026). Map imagery: USGS The National Map. Photos: Recreation.gov.
From the campground’s Recreation.gov listing: “Campgrounds facilities presently include a gatehouse/entrance, 2 Park Attendant campsites, 102 public campsites, 1 picnic shelter, 5 comfort stations with showers, 2 dump stations, 5 playgrounds, 1 designated swim area/beach, and associated paved roads and parking areas throughout. Day Use facilities presently include a new gatehouse/entrance installed in 2017, 1 volunteer host campsite, 27 picnic sites, 2 standard picnic shelters with water and electric service, 1 two lane boat ramp, 1 courtesy dock, 2 comfort stations, 1 playground, 2 designated swim areas/beaches, and associated paved roads and parking areas throughout. Hartwell Lake is a man-made lake bordering Georgia and South Carolina on the Savannah, Tugaloo and Seneca Rivers. The dam and lake area boasts 8 campgrounds and 11 day-use facilities that are operated by the US Army Corps of Engineers. The Hartwell Project was originally authorized for hydro-power, flood control, and navigation. Later, recreation, water quality, water supply and fish and wildlife management were added.”
Page data as of October 15, 2026. Full source notes are in each layer’s info in the app.