Invasive Plant Treatments

The Umatilla National Forest will soon begin an integrated approach of prevention, manual, mechanical, herbicide, biological control and cultural treatments to reduce the risk of invasive species expanding on the forest. This work will be implemented under the 2010 decision for the Invasive Plants Treatment Project EIS. 

Treatment sites are located across the Umatilla National Forest and will be signed at the time of treatment. Maps of the proposed treatment sites include:

• 2025 Invasive Plant Treatment Notification
  • Estimated Implementation: May 1, 2025 - September 30, 2025
• South Zone (Heppner and North Fork John Day Ranger Districts)
• North Zone (Walla Walla and Pomeroy Ranger Districts)
• Sheep Creek Area