Levels of 1000-3000 cfs are ideal. The annaul Green River Cleanup takes place in spring every year and is coordinated by Washington Recreational River Runners and Friends of the Green River.
Good beginner run close to Seattle.
November is often a good month to find this run at its prime. You will need a good hard winter rain. From Black Diamond take Green River Gorge Rd. The park is on your left before you cross the river again. Once you've entered Kanaskat-Palmer State Park head toward the right and a parking area with a short path that leads to the river.