Illinois State Parks · Illinois
Green River State Wildlife Area
Illinois State Parks · Illinois, United States
- Showers
- No
- Pets
- Yes
- Elevation
- 682 ft
- Dark sky
- Bortle class 2
- Cell coverage
- T-Mobile weak · Verizon weak · AT&T good (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Nearest town
- Harmon
- Address
- 375 Game Road, Harmon, IL 61042
- Phone
- (815) 379-2324
- Activities
- Camping, Equestrian Camping
About
Green River State Wildlife Area is an Illinois DNR state park in the Northwest region of Illinois. Camping site types: Class C (vehicular access without showers, or walk-in with shower access); Equestrian camping. Pets ARE allowed (leashed, with water, never left unattended or in a parked vehicle) - IDNR's general statewide practice, confirmed via Starved Rock State Park's own IDNR FAQ. No online reservation system for this site per IDNR's own live Camp Classifications table (dnr.illinois.gov/parks/camp/camp-classifications.html) - camping here is first-come, first-served, or by calling the park office directly.
Fees
Class C: $8/night - vehicular access without showers, or walk-in sites with shower access. Equestrian camping available (specific class/rate varies by site). Reservation fee $5/reservation (non-refundable) plus first night's camping fee; camping fees refunded if cancelled online 3+ days before arrival. Discounts (about half the listed camping fee, full utility fee still applies) for Illinois residents 62+ or disabled with a Class 2/2A card; Illinois disabled veterans and POWs camp free aside from the utility fee; no entrance fee to any Illinois state park (dnr.illinois.gov).
Weather, month by month
| Month | Typical high | Typical low | Coldest night | Hottest day | Years with a night below 32°F |
|---|---|---|---|---|---|
| January | 30° | 13° | -18° | 54° | 11 of 11 |
| February | 35° | 19° | -10° | 65° | 11 of 11 |
| March | 48° | 30° | 3° | 76° | 10 of 11 |
| April | 61° | 40° | 22° | 80° | 5 of 11 |
| May | 73° | 53° | 36° | 89° | 0 of 11 |
| June | 82° | 62° | 48° | 92° | 0 of 11 |
| July | 83° | 67° | 57° | 92° | 0 of 11 |
| August | 81° | 66° | 55° | 92° | 0 of 11 |
| September | 80° | 60° | 51° | 90° | 0 of 11 |
| October | 62° | 45° | 28° | 82° | 2 of 10 |
| November | 50° | 32° | 5° | 73° | 7 of 10 |
| December | 38° | 24° | -7° | 68° | 10 of 10 |
Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.
Nearby campgrounds
- Franklin Creek State Natural Area · Illinois State Parks · 17 mi
- Hennepin Canal State Trail · Illinois State Parks · 20 mi
- Prophetstown State Park · Illinois State Parks · 22 mi
- Castle Rock State Park · Illinois State Parks · 24 mi
- White Pines Forest State Park · Illinois State Parks · 25 mi
All public campgrounds in Illinois · Every state and province · Facts read from the operator 2026-08-25. Confirm fees, rules and current status with the operator before you go.