Illinois State Parks · Illinois

Green River State Wildlife Area

Illinois State Parks · Illinois, United States

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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

MonthTypical highTypical lowColdest nightHottest dayYears with a night below 32°F
January30°13°-18°54°11 of 11
February35°19°-10°65°11 of 11
March48°30°3°76°10 of 11
April61°40°22°80°5 of 11
May73°53°36°89°0 of 11
June82°62°48°92°0 of 11
July83°67°57°92°0 of 11
August81°66°55°92°0 of 11
September80°60°51°90°0 of 11
October62°45°28°82°2 of 10
November50°32°5°73°7 of 10
December38°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

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.