Thanks for the advice. The American River Trail was a good call. Not usually a big fan of rec trails when trying to cover 30+ miles but the River Trail is a good route Scenic of course and quiet in most places as you suggested. Once a few miles from Sacramento and until a mile or so from Folsom little to no foot traffic perhaps due to the weather that day. The day was VERY windy but riding among the trees along the river bank was only slightly breezy at ground level....until Folsom Reservoir and the exposed Auburn-Folsom Rd. The road has a good shoulder though and the route is recommended.
Auburn has at least one excellent bike shop, Victory Velo. Super nice guys...helpful and knowledgable too. They helped me route my next day's ride to Tahoe City.