PARK UPDATE:
- Spring trails are now open; the $6 winter access fee has ended for the season.
- The $7 per-vehicle MVEF (Motor Vehicle Entrance Fee) remains in effect.
- Seasonal trail closures (April 15–June 15) for waterfowl nesting:
- Affected segments run from the North Gate to the John Muir Trail along the Henrys Fork River, near the bird sanctuary.
- Construction notice (May – October):
- Harriman State Park sewer and waterline construction start date: May 22, 2025. Work continues through fall. Although only yurts are available for overnight rentals during this time, day-use facilities and trail access will be open to the public. When in the park, please observe any posted signage, caution tape, construction cones, or directions from Park staff about construction areas. You may be re-routed to access a trail, and parking lot areas may be limited due to the construction.
- Be advised that the primary location for restrooms will remain the Park’s vault toilets, as well as 4 porta-potties. These will be located at the Visitor Center and Boys House in the historic district. As waterlines will be affected by the construction, water fountains will not be operational. Please make sure to bring plenty of drinking water to use while enjoying the park. Thank you for your patience during our improvement to your State Park!
- The Boys House remains open as a family gathering space.
- Dog policy:
- Dogs allowed only in parking lots; no summer‑season trail access.
- Must be on a six‑foot leash and attended at all times; stray or unattended animals may be impounded at owner’s expense (IDAPA 26.01.20.175.09).
- Bear‑aware reminders:
- Make noise, travel in groups, stick to daylight hours.
- Carry bear spray and a bell.
- Follow our Facebook page for the latest trail conditions, upcoming events, and a link to local weather.
Park Reservations
By phone: 1-888-9-CAMPID or 1-888-922-6743
Become a Friend of Harriman State Park, a citizen support group, which serves as a fund raising and volunteer partner for Harriman State Park. FHSP works in cooperation with the park to enhance and preserve the park’s natural and cultural resources and visitor experience. FSHP is a project-driven group. With proceeds from the “Buy a Buck” campaign, the group has replaced the historic jack fence along Highway 20, produced the “Harriman Legacy” DVD, teamed up with Writers at Harriman, and started a native plant garden at the Harriman Visitor Center. They have also written a number of grants for projects that will directly benefit Harriman State Park.
Learn about the History of Harriman State Park and the Historic Railroad Ranch
Writers at Harriman is a one week workshop for high school students held the first week of August every year.
Mountains and Strings is a chamber music camp held for kids in mid July.
Current Conditions
Contact the Park
Address: 3489 Green Canyon Rd
Island Park, ID 83429
Phone: (208) 558-7368
Hours of Operation: Day-use locations within state parks are open from 7 am to 10 pm, per Idaho state code 26.01.20 (5). Day-use hours may change based on park manager discretion.
