Some maps show tennis courts on top of this reservoir but I couldn't find any way passed high fences around the property. Here I look over the gate to the one bit of trail on my map.
Thursday, June 3, 2021
45.503997222222225, -122.77432222222222
google map 
BOUNDARY 45.5025010, -122.7764409
BOUNDARY 45.5045231, -122.7726254