You are close to the John Wayne Trail - tunnels, trestles, mountains and views. It has campsites developed at intervals along the trail in the pass area. Gets to be ballast and An Adventure east of the river. At the Rattlesnake trailhead you can hop onto the Snoqualmie Valley Trail. If you have skinny tires, the JWT is probably not for you.
You can check it out on Traillink.com.
<http://www.traillink.com/trail/iron-horse-state-park.aspx?gce=201304_2&utm_expid=5284793-5&utm_referrer=http%3A%2F%2Fwww.traillink.com%2Ftrailsearch.aspx%3Fstate%3DWA>