Thomson Causeway Campground
Mississippi River - Pools 11-22 · Illinois · 126 sites
Photos: US Army Corps of Engineers via Recreation.gov
Overview
Thomson Causeway Campground is a US Army Corps of Engineers campground in Mississippi River - Pools 11-22, Illinois, with 126 sites in 5 loops. Mostly shady: most sites have good shade. T-Mobile, Verizon and AT&T report coverage at every site.
104 of 126 sites shaded
9 of 126 sites in full sun
35 of 126 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 Thomson Causeway Campground are the shadiest?
Most of them. 104 of 126 sites have good shade, much of it from the afternoon sun; the other 22 are more open.
See the tree canopy in RoamWhich sites at Thomson Causeway Campground get the most sun?
Only a few. 9 of 126 sites are truly sunny and 21 more get some sun; the rest are shaded.
See the tree canopy in RoamWill Starlink work at Thomson Causeway Campground?
At some sites. About 35 of 126 sites have a clear gap in the trees for Starlink and 35 a partial one; the rest sit under 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 Thomson Causeway Campground are the most level?
48 of 126 sites are flat, and 50 more have a gentle slope most RVs can level with blocks; 28 are steeper, better for tents. Sites that take RVs or trailers fit rigs up to 80 ft.
See the slope at each site in RoamDoes Thomson Causeway Campground have cell service?
Yes. T-Mobile, Verizon and AT&T all report coverage at every site at Thomson Causeway 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 RoamWhat’s the weather like at Thomson Causeway Campground in October?
In October, expect highs around 63°F and lows around 41°F, with about 2.8 inches of rain over the month. Every month’s averages are in Roam Premium.
Open Thomson Causeway in RoamCampground facts
- Sites
- 126 in 5 loops
- Kinds
- 121 for RVs or trailers · 5 tent-only
- Hookups
- 121 with electric
- Longest rig
- 80 ft
- Elevation
- 584–589 ft
- Every site
- Pets allowed
- 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.
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: “Of the 125 reservable campsites, 120 have electric hookups and 5 campsites do not have electric hookups and are for tents only. Campsites in the Hickory, Potters South, and Potters North camping loops have water available at each individual campsite. Thomson Causeway provides the comforts of modern camping, including drinking water, an accessible flush toilet, electrical hookups, shower house and boat ramp, while still providing visitors with an authentic outdoor experience. This park also offers 2 reservable picnic shelters for day use. The campground is built mainly on an island in the backwaters of the Mississippi River. Slow moving water on the eastern edge of the main recreation area creates a rich environment in which wildlife and fish abound.”
Page data as of October 15, 2026. Full source notes are in each layer’s info in the app.