Timothy Lake grows some big fish and offers a plethora of recreational activities.
Buck, Anvil, and Dinger creeks, along with Copper Creek, feed the reservoir. The reservoir was formed when the Oak Grove Fork of the Clackamas River was dammed for a hydroelectric project. It was named after the timothy seed the sheepherders used to sow in Timothy Meadows before they were filled with water. Horses and mountain bikes are allowed on the PCT and trails 528 and 529. Five large campgrounds, four boat ramps, and its close proximity to Portland ensure very heavy use by fishermen and outdoor enthusiasts.