Fall 2023 Update:
Attention: Dogs are not permitted beyond the parking lots. Harriman State Park of Idaho is a waterfowl and wildlife refuge. Dogs cannot be left attended and must always be on a six-foot leash. Department employees may impound or remove any stray or unattended animals at the owner’s expense. (IDAPA 26.01 20.175. 09)
There is a $7 Motor Vehicle Entrance Fee (MVEF) per vehicle to visit the Park. You can purchase a 2024 Annual MVEF Pass for $80 at the Park Headquarters. Vehicles registered in the State of Idaho can purchase a $10 Idaho State Park Passport from the Department of Motor Vehicles.
We will see what the weather brings and when the park will be implementing the Winter Access Fee of $6 per person or use of a Season Access Pass. Please continue to be Bear Aware! Remember to make noise; travel in groups only hike/bike during daylight hours.
Please be advised that Harriman State Park of Idaho will experience significant construction in the historic area during 2024-2025.
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**Note: If you do not have a Facebook account, please use your phone or browser, and scroll to the very bottom of this page. There you can see the latest Harriman State Park posts, including conditions updates.
Mesa Falls Recreation Area is owned by the US Forest Service and co-managed by Harriman State Park.
Summer/Spring
Big Falls Inn, an interpretive building and store, is open from Memorial weekend to mid-September from 9:30 a.m. to 5:30 p.m.
Winter
In the winter, Scenic Byway 47 does not remain open to vehicles but is groomed for snowmobile traffic.The falls are only accessible by snowmobile or cross-country skies and visitors can park at Bear Gulch on Scenic Hwy 47 east of Ashton and ski or snowmobile the packed road 5 miles to Mesa Falls. Snowmobilers can also reach Mesa Falls from Hwy 20 via Scenic Byway 47, which is a 14-mile scenic ride. The Big Falls Inn is open on weekends from 10:00 a.m. to 3:00 p.m. from the first week in January to the second week in March and you can go in and warm up by the fire. The trail down to the falls is very snow packed and icy and visitors should use extreme caution if attempting this scenic view.
More Information
Current Conditions
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.
