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Coal Creek Natural Area Upper West Trailhead and trails close July 29-30 for King County sewer line replacement project


Work in preparation for a major King County sewer replacement project requires a temporary closure of the Coal Creek Natural Area Upper West (Red Cedar) Trailhead and nearby trails on Monday, July 29 and Tuesday, July 30.


The Coal Creek Natural Area Upper West (Red Cedar) Trailhead and trails in the vicinity will be closed July 29-30 for work as part of King County’s Coal Creek sewer upgrade project that will serve growing Eastside neighborhoods for decades to come. 

The trailhead parking lot will be closed, along with trails in the area – including trails within the Coal Creek Natural Area from Forest Drive Southeast and Southeast 60th Street. King County’s brief work at the trailhead parking lot is occurring at the same time and in coordination with a longer-term City of Bellevue culvert replacement project there. 

For nearby hiking option during this brief closure, check out King County’s Cougar Mountain Regional Wildland Park. The park’s 36 miles of hiking trails are readily accessible from King County Parks’ Red Town Trailhead, which is just a few miles away from the Upper Coal Creek Trail West Trailhead.

King County is upgrading a regional sewer line that was built between 1966 and 1991 to serve the Bellevue and Newcastle areas. The pipeline is nearing its maximum capacity and needs to be upgraded to carry more wastewater and meet the Eastside’s growing population.

Project updates will be posted frequently at, where people can learn more about the project and provide input at an online open house.

For additional information, text KING COALCREEK to 468-311, or contact Monica Van der Vieren at 206-477-5502 or