Hitt’s Hill Park, with its long history of neighborhood involvement, is having its monthly work party this Saturday. Scott posted the following to the CC Facebook page:
The monthly work party in Hitt’s Hill Park on the south edge of Columbia City is this Saturday from 10 to 1. Meet at the shed along the path. Tools are provided. Help for as little/long as you can or just walk through and say hello to a few neighbors
For a little more history on Hitt’s Hill, be sure to check out this profile from Komo News:
Columbia City Source 
You didn’t include location.
Sent from my iPhone
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Hitt’s Hill Park: 5234 37th Ave S, Seattle, WA 98118. “Meet at the shed along the path”