Ainsworth State Park
- Status
- Open (per official listing)
- Entrance fee
- See fee details
- Day-use reservations
- None mentioned
- Dogs
- Statewide rule — see below
- Camping
- Yes
- Official site
- stateparks.oregon.gov(503) 793-9885
Official page last checked Oct 29, 2026. Details last changed Oct 29, 2026. How we keep this current
Current alerts 1
Alert General advisoryThis park is within the Multnomah County permanent quarantine zone for all ash, olive, and white fringe tree materials. These tree materials,… (more)
This park is within the Multnomah County permanent quarantine zone for all ash, olive, and white fringe tree materials. These tree materials, including firewood, must stay within the county where they were collected to help slow the spread of the emerald ash borer, a highly invasive insect, sighted in this county. Help protect our forests by following these firewood tips: • Buy firewood local to your campsite: Choose firewood harvested within 10 miles of your destination or buy certified heat-treated firewood. • Avoid transporting restricted wood: Do not bring ash, olive, or white fringe tree materials into any Oregon State Park even if it’s within the same quarantine area. When in doubt about the tree species, leave it out. Learn more about the quarantine and emerald ash borer.
Posted by the park 2025-09-09. Official alert
Overview
Ainsworth State Park is a park in Multnomah County, about 14 miles east of Washougal.
Popular activities here are wildlife watching, hiking, and picnicking. Overnight options include campsites, with RV sites with full hookups, tent sites, and showers.
Hours
Park, gate, office and facility hours are listed separately because they often differ. Alerts above override normal hours.
| Facility | Days | Hours | Season |
|---|---|---|---|
| The park’s wording doesn’t give clock times — see the official wording below. | |||
Official wording
Open for day use: Mar 21 – Oct 31 Open for camping: Mar 21 – Oct 31
Source: official park page, checked Oct 29, 2026. Times are local to the park (America/Los Angeles).
Fees and passes
| Item | Amount |
|---|---|
| There is a | $10 |
Official wording
Dump Station Fee There is a $10 fee to use the dump station. You can pay by scanning the QR code posted at the station. You do not need to be a registered camper to use the dump station. Registered state park camping guests only need to pay once per stay to use the dump station. For more information see the FAQ page – the dump station questions are at the bottom of the General section. How do I get a Special Use Permit? This park requires a Special Use Permit for special events or activities. Please open the Special Use Permit application to see examples of events that need a permit. If you have questions about whether you need a special use permit for your activity and to receive instructions on how to submit the application, please call 503-695-2261.
Oregon park passes
- 12-month day-use parking permit — $60 Oregon residents; $75 non-residents. Day-use parking at parks that require a day-use parking permit Details
- Daily parking permit — $10 per day per vehicle (residents); $12 (non-residents). Parking for the day at any state park that requires a day-use parking permit Details
From the Oregon state guide. Confirm which passes this park accepts.
Reservations
- Day use
- No day-use reservation requirement mentioned
- Booking system
- ReserveAmerica (oregonstateparks.reserveamerica.com)
- Phone
- 800-452-5687
We link to the official booking system rather than showing live availability, which changes minute to minute.
Pets
See the park’s wording
Can I bring my pet? There is an off leash dog area 10 miles west of Ainsworth at Rooster Rock State Park.
Service animals are generally permitted where pets are not. Check with the park for specific areas.
Camping
| Campground or site type | Sites | Hookups / features | Price |
|---|---|---|---|
| Seasonal Camping Book reservations up to 6 months in advance at oregonstateparks.reserveamerica.com.
• 40 full-hookup sites (1 is accessible to campers with disabilities)
• 50 amp electrical
• Six walk-in tent sites with parking nearby
• Hiker/biker camp area (no reservations)
• Flush toilets
• Firewood for sale | — | 40 full-hookup sites (1 is accessible to campers with disabilities); 50 amp electrical; Hiker/biker camp area (no reservations) | — |
Camping details from the park
Seasonal Camping
Book reservations up to 6 months in advance at oregonstateparks.reserveamerica.com.
- 40 full-hookup sites (1 is accessible to campers with disabilities)
- 50 amp electrical
- Six walk-in tent sites with parking nearby
- Hiker/biker camp area (no reservations)
- Flush toilets
- Firewood for sale
When is the campground closed?
Campground is closed November 1 through Mid March
When is the campground open?
The campground is open mid March through October 31.
From the official park page, checked Oct 29, 2026. Site counts and prices can change; confirm when booking.
Things to do
Wildlife viewing and birdingHikingPicnickingCamping
Trails
Hiking
The shaded campground is the perfect jumping-off point for a hiking adventure. Picnic tables, a plumbed restroom, and access to the Gorge 400 Trail and Horsetail Falls (#438) trail are located along three roadside parking areas a half mile west of the campground entrance.
Amenities
Facilities
- Restrooms
- Flush toilets
- Showers
- Picnic areas
- Playground
Camping
- RV dump station
- Tent camping
- RV camping
- Electric hookups
- Water hookups
- Sewer hookups
✓ listed by the park · ✕ the park says it is not available. Anything not shown here isn’t mentioned by the official source — that means unknown, not unavailable.
Rules and permits
Know Before You Go
- Ainsworth is near Interstate 84 and a working rail line that operates day and night.
Can I fly my drone in the park?
Please call the park at 503-695-2261 for park specific rules.
Can I metal detect?
No metal detecting is permitted in the West Columbia River Gorge State Parks.
Getting there
- Nearest town
- Washougal — about 14 mi east (straight line)
- Coordinates
- 45.5984, -122.0490
- Phone
- (503) 793-9885
Nearby state parks
Sources and freshness
- Oregon State Parks — park page — last checked Oct 29, 2026; page says updated Oct 13, 2026
- Oregon State Parks park finder JSON (services/park.cfc?method=getAll), used by the Find a Park page
- Wikidata
“Last checked” is when our system last read the official source. “Last changed” (Oct 29, 2026) is when the information shown here last differed from the previous check. Hours, fees and rules can change without notice — confirm with the park before you go. Methodology