🌤 Weather at Eagle Island State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 35–72 °F | 54–93 °F | 32–80 °F | 25–46 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Boise Air Terminal, 10 mi away, elevation 2,814 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
Eagle Island State Park is Boise’s ultimate summer destination—a man-made lake with sandy beach, water slide, and paddleboard rentals surrounded by the Boise River! Perfect for families seeking water fun.
Water Activities
| Activity | Details |
|---|---|
| 🏖️ Beach Swimming | Sandy beach, man-made lake |
| 🎢 Water Slide | Memorial Day – Labor Day |
| 🛶 Paddleboard Rentals | On-site concessionaire |
| 🎣 Fishing | Main pond + Boise River |
Camping (Limited)
| Info | Details |
|---|---|
| 🚐 RV Sites | Limited availability |
| 💧 Winter Water | Shut off Oct 28 – Apr 1 |
| 🚤 Boats | Non-motorized only |
FAQ
Can I float the Boise River from here?
The park borders the Boise River on both sides, but the main float goes Barber Park to Ann Morrison Park—not from Eagle Island directly.
🎢 Boise’s Water Playground
Visit ID State Parks
Location & Getting There
Eagle Island State Park is located in Idaho. The park’s coordinates are 43.6872, -116.3556. Check the park’s official website or your state parks app for detailed driving directions and GPS navigation tips.
Quick Facts
- Location: Idaho
- Coordinates: 43.6872, -116.3556
- Activities: Hiking, Camping, Fishing, Wildlife Viewing
- Pets: Allowed on leash in most areas (check local rules)
Things to Do
Idaho parks showcase Northern Rockies and high desert beauty — alpine lakes, dramatic canyons, volcanic landscapes, and whitewater rivers. Activities include hiking, fishing rainbow and cutthroat trout, camping in remote settings, mountain biking, cross-country skiing, and whitewater rafting.
Best Time to Visit
Summer is peak with warm days and open trails. Fall brings golden aspens and uncrowded fishing. Winter is great for snow sports. Spring can be muddy at higher elevations.
Visitor Tips
Entry fee $7/day or $40/annual. Reservations up to 9 months in advance. Many parks are remote with limited cell service. Bear country protocols apply in northern Idaho.
Nearby Attractions
Anderson Island (ferry from Steilacoom) is 3 miles east. Ketron Island is nearby. McNeil Island — a former federal prison island — is visible from the park. Steilacoom — Washington’s oldest incorporated town — is 5 miles east with the Steilacoom Historical Museum.
Explore More Idaho State Parks
Eagle Island State Park is one of many outstanding state parks in Idaho. Discover more parks in our Best State Parks in Idaho guide, or use our Park Finder to search by activity, location, or features.
Make it a road trip: Pair a visit with Lucky Peak State Park (within about an hour’s drive) or Lake Cascade State Park (elsewhere in the state).
🐾 Dogs & Pets at Eagle Island State Park
- Pets allowed? statewide rule
- Pets are welcome in most Idaho state parks and on trails, but only if confined or controlled on a leash no longer than 6 feet.
- Leash rule statewide rule
- 6 ft maximum leash required, or pet must be confined (e.g. in a camper)
- Beaches & swim areas statewide rule
- Pets are prohibited from all swim areas and beaches statewide (service animals excepted)
- Cabins & lodging statewide rule
- Pets are allowed at most parks but some parks prohibit them in some cabins and yurts
- Statewide exceptions statewide rule
- Park managers may designate off-leash exercise areas (e.g. Eagle Island off-leash trails); pets may not be left unattended
Are dogs allowed at Eagle Island State Park?
Pets are welcome in most Idaho state parks and on trails, but only if confined or controlled on a leash no longer than 6 feet. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via parksandrecreation.idaho.gov. More: Idaho state parks guide · Dog rules in all 50 states compared
Park Map
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