Sandy River Gorge

Why It's Important
At Sandy River Gorge, six miles of untamed river with upland terraces and canyons provide excellent habitat for native fish, wildlife and an old-growth forest, all within 20 miles of Oregon's largest urban area.

Long before the Cascade Range existed, the ancestral Sandy River began carving its meandering course. As the Cascades rose, the stream cut through twenty million years of northwest Oregon geology, carving a 700-foot-deep gorge that exposes a cross-section of seven major geologic formations. The Sandy River's cold waters originate in the snowfields of Mt. Hood.

Location
East of Portland in the Sandy River Gorge, between Dodge and Oxbow parks.

The Sandy River Gorge Preserve (Diack Tract) is closed to the public until further notice.
We are working to address visitor impacts affecting our neighbors and the resources our preserve is designed to protect. We encourage visitors to the Sandy River to explore other areas open to the public for fishing, hiking and other recreation, such as Oxbow Park, Dodge Park, Dabney State Park, Wildwood Recreation Area, Glenn Otto Park and Lewis and Clark State Park.

We will replace this notice whenever we are able to open the Diack Tract again to public visitors. We thank you for your support and patience. For more information, please don't hesitate to call The Nature Conservancy at 503 802-8100 or e-mail us.

Size
436 acres

Plants at the Preserve
Within the gorge lies the best remaining low elevation old growth Douglas-fir forest in Oregon, including trees over 500 years old. Forested upland terraces provide a corridor for wildlife, including black bear, cougar and elk.

Animals at the Preserve
The Sandy River provides excellent spawning habitat for native runs of Chinook and coho salmon and steelhead trout. The forest is home to the Oregon slender salamander, a species found only in northwestern Oregon. Black-tailed deer, river otter and osprey are also common.

Why the Conservancy Selected This Site
The Sandy River Gorge is the last undeveloped western Oregon river near a metropolitan area. Protection for this unique treasure began in 1970, when the Diack family donated 156 acres to the Conservancy. Today, after years of planning and coordination by the U.S. Bureau of Land Management, state agencies, Metro and private conservation groups, most of the Sandy River Gorge is protected and managed for its natural, scientific, educational and recreational values. Popular with wildlife watchers, anglers, rafters and kayakers, the Sandy River is designated an Oregon Scenic Waterway and a federal Wild and Scenic River.

What the Conservancy Has Done/Is Doing
The Conservancy owns several properties in the gorge. Ecologists monitor streamside habitats, amphibian populations and water quality. Volunteers and youth corps teams remove non-native invasive Scots broom, Japanese knotweed and Himalayan blackberry, and maintain hiking trails. Volunteer naturalists lead interpretive field trips. Many educational activities, including a fall salmon festival and additional hiking trails, are enjoyed at Oxbow Park.