Three Island Crossing State Park - United States
Discover the RVezy RV rental marketplace
About Three Island Crossing State Park
RV quick facts for Three Island Crossing State Park
Featured RV rentals for Three Island Crossing State Park
Best time to visit Three Island Crossing State Park
Late spring through early fall, roughly May through September, offers the most comfortable weather for RV travel, with warm days ideal for river access, picnicking, and walking the interpretive trails. July and August are peak, hot, and busy, so shoulder months like May, June, and September balance mild temperatures with lighter crowds. A celebration of the emigrant crossing of the Snake River occurs the second Saturday of August each year, which is popular with history-minded travelers. Winter visits are quieter but cold, with limited services.
Cold winter conditions; campground open but limited visitation.
Cool and quiet; plan for freezing overnight temps.
Early spring, variable weather.
Mild days, cool nights; good shoulder season.
Pleasant camping weather, wildflowers along the river.
Warm and dry; excellent for river activities.
Peak season, hot and busy; reserve sites early.
Hot and dry; Three Island Crossing celebration held second Saturday.
Warm days, cool nights; ideal shoulder season.
Crisp fall weather, fewer visitors.
Late fall, chilly with occasional storms.
Winter conditions; some campground services reduced.
Things to do at Three Island Crossing State Park
- Oregon Trail History and Education CenterRV parking available
The History and Education Center interprets the emigrant experience at Three Island Crossing. The center shows a film about the Oregon Trail. Exhibits, artifacts, and ranger programs bring the story of the river ford to life for all ages. blm.gov/sites/default/files/docs/2023-09/Main_Oregon_Trail.pdf
- View Oregon Trail Ruts EasyRV parking available
Original wagon ruts are visible within the park itself. Oregon Trail ruts are visible between the river and the Center. A short interpretive walk connects the education center to the riverbank viewpoints.
- Three Island Crossing Overlook Easy
The overlook sits on the bluff across the Snake River from the main park. Three Island Crossing Overlook is located on top of the bluff across the river from Three Island State Park. Amenities include a small gravel path, interpretive wayside exhibits, and parking, and the three islands from which the crossing gets its name are visible from the overlook. Parts of the road to the overlook are unpaved but suitable for most vehicles in dry weather. nps.gov/places/000/three-island-crossing-overlook.htm
- Snake River Fishing and Paddling EasyRV parking available
The park provides direct access to the Snake River for anglers and paddlers. Bass, catfish, and trout are common catches, and calm stretches near the park suit kayaks and canoes. An Idaho fishing license is required.
- Interpretive Walking Trails EasyRV parking available
Short, flat trails wind through cottonwood groves and along the riverbank. Wayside signs describe wagon-train history, local ecology, and the geography of the fording site. Trails are stroller and mobility friendly.
- Main Oregon Trail Back Country BywayRV parking available
The park anchors a self-guided auto tour of Oregon Trail landmarks. Part 1 of the Byway is a loop drive that takes you to the south side of the Snake River to view the Three Island Crossing location from the bluffs above the river, then ends on the north side of the river at Three Island Crossing State Park History and Education Center. All of the Byway roads are paved or good gravel roads, though high clearance vehicles may be required to access the trail off the Byway; four-wheel drive is not needed for the Byway. blm.gov/sites/default/files/docs/2023-09/Main_Oregon_Trail.pdf
- Picnicking and Day-Use Areas EasyRV parking available
Shaded picnic areas with tables and grills sit beside the Snake River. The grassy grounds are a popular stop for travelers breaking up the I-84 drive. Amenities include picnic tables, restrooms, trailhead access, and drinking water.
RV delivery to a campground, made simple
Skip the pickup. Skip the towing. Get an RV delivered and set up at your campsite so you can arrive, unpack, and start your trip stress-free.
Choose your perfect RV
Browse RVs that offer delivery to your site and book the one that fits your budget and adventure style.
Lock in your campsite
Reserve your campsite with the hookups and amenities you need. We’ll help you find RVs that meet site requirements.
Arrive and relax
Your host delivers and sets up the RV before you get there. Just show up and start enjoying your trip.
Find the perfect RV for these nearby campgrounds
RV Rentals Three Island Crossing State Park
Three Island Crossing State Park, ID, United States
How to get to Three Island Crossing State Park
The park sits on the north bank of the Snake River in Glenns Ferry, Idaho, reached from Interstate 84 via Exit 121 or Exit 120. The State Park Route begins at Exit 121 on Interstate 84, the eastern exit for Glenns Ferry, where all services are available. Boise is roughly 75 miles west (about 1.25 hours) and Twin Falls is roughly 70 miles east (about 1 hour), both offering fuel, groceries, and RV supplies. The nearest major airport for fly-and-rent travelers is Boise Airport (BOI); roads into the park are paved with no tunnels or steep mountain grades, though summer crosswinds along I-84 can affect tall RVs.
RVezy vs. Traditional RV rental
RVezy rentals
- Book directly from local RV owners
- Choose the exact RV you want
- Delivery to your campsite, home, or destination
- More variety: trailers, motorhomes, and campers
Traditional RV rental
- Limited fleet from a rental company
- Exact RV not guaranteed
- Pickup only at retail locations
- Fewer RV types and less availability