The upper Wenatchee is a great beginner run. Similar size and feel as the SF Sky run too. It's a long run so most the time people run a section of it rather than all 16 miles. The bridge on the Chumstick Highway basically divides the run in half so it's a good put-in or take out. You can run from Lake Wenatchee to there or put in there and run down to the Hwy 2 bridge.
It can be run pretty low too, so you can sometimes run it even in September/October. I hear it's really nice if you get on it when the Salmon are running but haven't seen that myself.
If your group is feeling lively after that, you can always continue down to Tumwater canyon from there.
Edited by JoesKayak - 10 Jun 2016 at 8:49am