Gorge Weeds – Early Detection Rapid Response

The Columbia River Gorge draws thousands of visitors a year for hiking, fishing, boating, bird watching, wind surfing, and many other activities. Along with stunning views and dramatic geology, visitors can see a variety of wildlife and wildflowers in the Gorge, but unfortunately many of the blooming species they see while enjoying this National Scenic Area are unwelcome weeds. Some species in particular have been targeted for early detection efforts, to help prevent their spread before they can become too established here.

Land managers on both sides of the Columbia River have banded together to form the Columbia Gorge Cooperative Weed Management Area (CGCWMA). The group includes representatives of state and federal agencies, non-profits, universities and regional landowners who work together to protect the Gorge from invasive species.

As a partner in the CGCWMA, the Hood River SWCD helped apply for and manage a grant from National Fish and Wildlife Foundation (NFWF) for a two-year “Early Detection & Rapid Response (EDRR)” project (Project Overview) to target work on target weeds in the Gorge from several angles.  The Hood River SWCD hired local botanist, Emily Stevenson to implement the EDRR project  in 2011 and 2012.

Projects_EDRR_SurveysArmed with weather resistant gear and clothing, Emily spent the two summers traveling throughout the Gorge by boat, car, and on foot to seek out locations of early invaders and established weed patches.  A total of 47 sites (over 150 miles of trail) in and around the Columbia Gorge National Scenic Area were surveyed for target weed species including false brome (Brachypodium sylvaticum), garlic mustard (Alliaria petiolata), and knotweed (Polygonum spp.).    Several hundred new observations were made in addition to collecting existing data.  All findings were reported to both the appropriate state weed database (iMapInvasives in Oregon) and the land manager.

In addition to the surveys and data reporting, seven “Weed Watcher” workshops were held for a total of 163 attendees providing training on EDRR practices and noxious weed identification.  A field guide to the “Worst Weeds of the Gorge” was developed and published.

Projects_BootBrushBoot brushes and signage were installed at 25 key trailheads in the Columbia River Gorge to encourage visitors to clean their boots before and after hiking.  (View a map of the boot brush stations in the Gorge). This helps minimize the spread of weed seeds through the sensitive and unique habitats found in the Columbia River Gorge National Scenic Area.  Visitors can report invasive species sightings at, or can use their smart phones to report observations directly to iMapInvasives. Engaging both land managers and visitors to the Gorge will ensure the protection of its natural beauty and biodiversity for generations to come.

Projects_OPB_FilmingThe Boot Brush Project was a huge success, even attaining a television spot on the Oregon Public Broadcasting show Oregon Field Guide. You can watch the video at Now that the CG-CWMA has baseline data as well as new observations and survey results, the team can better prioritize future treatment and survey efforts and can easily share data between all partners. To learn more about the importance of boot brushes, visit our article Clean Your Boots to Protect the Columbia Gorge.

For more information about CWMA projects contact the Columbia Gorge CWMA Coordinator at

Projects_NFWF_LogoAs one of the largest conservation funders in the world, NFWF supports hundreds of science-based, results-oriented projects that bring new solutions to the country’s biggest conservation challenges.  Across the U.S., NFWF funds projects to save imperiled species, promote healthy coasts, forests and grasslands, and guarantee water for wildlife and people.  With federal, state and local agencies and corporate partners, NFWF finds common ground between the public and private sectors to achieve positive conservation results.