Pendelton Creek headwaters and wetland found by chasing down to the end of another dead end.
Sunday, July 4, 2021
45.48160555555556, -122.72836944444444
google map 
45.481547222222225, -122.72865277777778
45.4814976, -122.7283466
45.481433333333335, -122.72846111111112
45.48133055555556, -122.72848611111111
From signage ...
In 2006, large truckloads of invasive plants were removed and the site was planted with the first group of native plants, with more planting done in 2007.
Sponsors: Environmental Services City of Portland, Portland Public Schools, Metro, Waste Management Oregon.