The Sunriver Resort is near Bend, Oregon, which is a rightfully famous, and incredibly beautiful, area for outdoor adventure.
In the winter, there is skiing at nearby Mt. Bachelor (25 min away), but the summer has even more to do, including golfing, hiking, mountain bike riding, tennis, and of course, swimming in the resort's amazing pool, which has a water slide, sand play area, hot tub, and amazing views of Mt. Bachelor and the golf course.
The rooms are up to date and nicely appointed. The main lodge has a great bar area, a nice restaurant, and a large "back lawn" with live music and kid-friendly activities.
Overall, a highly-recommended place for a family vacation.