Capitol Forest is a large state forest just outside of Olympia managed by DNR. The forest is 91,650 acres (150 square miles) with 166 miles of singletrack and 575 miles of gravel road. There is a wide variety of rides you can put together here, ranging from 5 mile road rides to 40+ mile singletrack epics.
Wide variety, tons of trails. Lots of good flow to be had.
Friends of Capitol Forest (FOCF) does a ton of great trail work out here. FOCF was started by mountain bikers, but welcomes all trail users. Come on out and join a work party.
The Mima Mounds are a unique geographical feature to the area and are just off the south east side of the forest.
Stop by Olympia and lobby for more trail funding!
After a long ride and/or hobnobbing (or is that hobknobbying?) with your local legislator, post-ride beers and excellent food can be had at the Fish Bowl on 5th and Jefferson. The Organic Amber is a local favorite, and you can't go wrong with the Oyster Burger or the Fish and Chips.