U.S. Army Corps of Engineers · Upper Mississippi River National Wildlife And Fish Refuge · IL
Site Octagon.
This site, in 2 agency photographs
Photos · USACE
Photos: Recreation.gov RIDB media records filed against this campsite · Oct 19, 2026
Group Picnic AreaType
Reservablerecreation.gov lists it
ADAAccessible
590 ftElevation
65%Tree cover
179 ftWater · to Mississippi River
The agency files this record as day use, not as a place to spend the night. It’s on this site because the agency files it against this campground, not because it’s somewhere to camp.
Elevation: USGS 3DEP elevation point query at this site’s coordinate · Sep 7, 2026
Tree cover: NLCD Tree Canopy Cover 2024 (USDA Forest Service / MRLC), one 30 m cell at this coordinate · Sep 9, 2026
The site
TypeGroup Picnic Area
LoopTHOMSON CAUSEWAY
HookupsElectric 15
Capacity/Size RatingSingle
Max Num of People30
Max Num of Vehicles15
Pets AllowedYes
AccessibilityYes
Base Number of People0
Base Number of Vehicles0
BbqYes
Checkin Time6:00 AM
Checkout Time10:00 PM
Electricity Hookup15
Location RatingGood
Min Num of People1
Min Num of Vehicles0
Picnic TableYes
Proximity to WaterRiverfront
AccessibleYes
Source: Recreation.gov RIDB full extract, per-site record · Oct 19, 2026
Not a place to sleep
The agency files this record as day use, not as a place to spend the night.
Source: Recreation.gov
The campground
Every site, the season, fees, weather, and what’s happening on this land right now: Thomson Causeway →
Most private sites here130 95 ft051 94 ft021 91 ft112 90 ft066 84 ft
Source: CAMPANAC campground index