Iron Horse State Park: John Wayne Pioneer Trail, South Cle Elum to Easton Professional Review and Guide
"This 11.5-mile (each way) section of the trail travels by some residences, rural lowlands with mountainous backdrops, pine transitional forest, and makes tow passes over the Yakima River and feeder creek crossovers as well. Wildlife viewing can be bountiful, too.
The trail is well-suited to the beginner with its nearly flat, non-technical nature, good scenery, and the opportunity to socialize and learn basic bike handling skills without the burden of auto traffic. If you're a beginner who can do this mileage on a paved road, you can do this ride. The trail is well suited to the advanced rider as well, because it can be extended to a much longer outing."