USFWS · Oregon

Three Arch Rocks Wilderness

Designated as the first National Wildlife Refuge west of the Mississippi River, Three Arch Rocks Refuge and Wilderness lies half a mile offshore of the community of Oceanside. One of the Oregon coast's best-known landmarks, the Wilderness consists of three large and six smaller rocks totaling 15 acres of unsurveyed lands above the line of mean high water. Which adds up to one of the smallest designated wilderness areas in the country. The rocks provide habitat for Oregon's largest breeding colony of tufted puffins. These flamboyant birds with their large bright orange beaks and long yellow head tufts are one of the most recognizable seabirds on the Oregon coast.

Description from Wilderness Connect (wilderness.net).

Official page at Wilderness Connect ↗
Three Arch Rocks Wilderness
Photo from Wilderness Connect, wilderness.net
DesignationWilderness
Managed byU.S. Fish and Wildlife Service
StateOregon
Size15 acres
Designated1970, by Congress
Center point45.46° N, 123.99° W
Night skyAbout as dark as the ground gets (Black Marble reading 7)

Boundary map

1 outline

Boundary, simplified to about 0.005 degrees

The outline is the agency boundary simplified for display, so small parcels and inholdings may not show. The agency page has the authoritative map.

Weather by month

NOAA climate normals →
Weather by month near Three Arch Rocks Wilderness40°50°60°January: 13.38 inches of precipitationFebruary: 9.49 inches of precipitationMarch: 10.05 inches of precipitationApril: 7.48 inches of precipitationMay: 4.56 inches of precipitationJune: 3.28 inches of precipitationJuly: 0.92 inches of precipitationAugust: 1.20 inches of precipitationSeptember: 3.58 inches of precipitationOctober: 7.80 inches of precipitationNovember: 13.44 inches of precipitationDecember: 14.65 inches of precipitationJanFebMarAprMayJunJulAugSepOctNovDecJanuary: 44.5°F averageFebruary: 44.7°F averageMarch: 46.0°F averageApril: 48.3°F averageMay: 52.4°F averageJune: 55.9°F averageJuly: 59.0°F averageAugust: 59.7°F averageSeptember: 57.6°F averageOctober: 52.6°F averageNovember: 47.2°F averageDecember: 43.5°F average0 in5 in10 in15 inTemp °FInches
The line is the average temperature and the bars are average precipitation at Tillamook, 6 miles from the center point at 12 feet, station USC00358494 in the NOAA monthly climate normals for 1991 to 2020. Precipitation totals about 90 inches a year.

Large units span more than one climate. The station stands in for the center point, and the outer parts of the boundary can be warmer or colder.

Where to camp

Campsite Atlas →

No federal campground is within ten miles of the boundary in the Campsite Atlas index. Camping inside a wilderness is usually allowed away from trails and water, with no facilities; the managing agency page has the permit and group-size rules.

Explore

Nearby on the other atlases

National Register listings within 15 miles · 5 in all · Register Atlas

Landmarks are listed first, then by distance from the boundary.

Guidebooks for Oregon

We earn a small commission if you buy through these links. It does not change what we list.

  • Pacific Crest Trail: Oregon and Washington
    Andy Selters, 2019
    Find at Bookshop.org
  • Oregon's Ancient Forests
    Chandra LeGue, 2019
    Find at Bookshop.org
  • Backpacking Oregon
    Douglas Lorain, 2018
    Find at Bookshop.org
  • Best dog hikes Oregon
    FalconGuides (Publisher), 2017
    Find at Bookshop.org
  • Best hikes near Portland, Oregon
    Fred Barstad, 2016
    Find at Bookshop.org

Titles come from Open Library's catalog, matched by subject heading or by title.

Reference

Questions people ask

How big is Three Arch Rocks Wilderness?

15 acres.

Source: Wilderness Connect

Who manages Three Arch Rocks Wilderness?

The U.S. Fish and Wildlife Service.

Source: Wilderness Connect

What state is Three Arch Rocks Wilderness in?

Oregon.

Source: Wilderness Connect

When was Three Arch Rocks Wilderness designated?

Congress designated it in 1970.

Source: Wilderness Connect

How do I get to Three Arch Rocks Wilderness?

A point inside the boundary is at 45.462° N, 123.985° W. The official page carries directions and the office address.

Source: Wilderness Connect

Are there historic places near Three Arch Rocks Wilderness?

The National Register has 5 listings within 15 miles, including Cape Meares Lighthouse and Herschell--Spillman Noah's Ark Carousel.

Source: Register Atlas

Sources

  • Boundary, name, acreage, designation year, states and description: Wilderness Connect.
  • Campgrounds: the Campsite Atlas index of federal campgrounds, matched to this boundary at build time.
  • Trailheads and sites: the Forest Service Recreation Opportunities layer, points inside the boundary.
  • Night sky: NASA Black Marble (VIIRS, 2016 composite) sampled at zoom 6 around the center point.
  • Weather, alerts, air quality, river flow and earthquakes load live in your browser from NWS, AirNow, USGS and iNaturalist when you open the page.