Aggressive outbreak of Douglas-fir beetle detected in Summit Park

PARK CITY, Utah — Summit Park is currently experiencing an aggressive outbreak of the Douglas-fir beetle, which is causing a rapid localized die-off of large, mature Douglas-fir trees. An estimated 50 to 60 trees are either dead or in severe decline on several private vacant lots in the Matterhorn Drive area of Summit Park and a small area of adjoining land in the Summit Park Open Space.

Homeowners are asked to take proactive steps to reduce further spread, here’s how:

• Learn how to distinguish Douglas-fir trees from other conifer trees. If you need help identifying a Douglas-fir tree, please visit the USU extension office online, or contact the Summit County Lands and Natural Resources Department.
• Review the photographs below showing signs of infestation and the current outbreak location.

• Inspect all Douglas-fir trees on your property for signs of infestation and symptoms such as boring dust, pitch tubes, or browning needles.
• If you are not able or confident in your ability to inspect, please reach out to Summit County, or a local tree arborist for help.
• If you identify signs of a mass beetle infestation, contact the HOA immediately or summitparkfirewise@gmail.com! The HOA is currently providing a non-toxic pheromone repellent to homeowners. The repellant is proven effective at protecting healthy trees from beetle attacks. These packets are already being distributed in and around the outbreak area in an effort to contain the spread.

Unfortunately, there is no indication that the infestation will remain limited to its current location. A Douglas-fir beetle outbreak can cause significant damage to community forests by killing large numbers of trees, leading to widespread mortality in local and community forests. This mortality affects forest health, leading to an increase in wildfire risk due to dead wood buildup and significantly disrupts local ecosystems. Early detection and response are critical to limiting the spread and minimizing damage. The Summit Park HOA is actively working to contain the outbreak, in collaboration with the Department of Forestry Fire and State Lands, Summit County Lands and Natural Resources Department, and Snyderville Basin Special Recreation District, to develop both short and long term strategies to address this significant ecological threat.

While the Douglas-fir beetle infestations usually begin when trees are weakened by stressors like drought and overcrowding, these outbreaks are often intensified by warm, dry conditions and forest management practices that lead to dense, unhealthy stands. If the infestation continues to expand unchecked, the potential impact on our forest and community could be devastating. All Summit Park residents are asked for their prompt attention to this urgent matter to preserve the health and beauty of their private and community forest.