been thing about doing the Round the Mountain Run. Here in washington. The mountain! Mt Rainier From the Yelm area to the Yackama area back to Seattle area and back to Yelm.
Anyone done this RUN?
Also thinking late summer. Becuse I want to run thur Nat Park Thur I think its sunrise over to the pass. Know the pass is closed till at the earlyest May but usaly Mid June.
My guess is about 9 hours seat time? Not including stops for fuel. Eating and just plain out breaks. Plan is to go with a few buddies. Smallest bike a 250cc largest a 1100cc 
All advise is good. 90% of us are non drinkers BUT not some A.A. thing.  

What you are describing is an easy relaxing day run, with time for lots of stops and sight seeing. Done it many times. 7 hours plus stops

Gary TJ you've made the run around Mt Rainier?

I make it at least two or three times a Summer! NICE 7, 8 hour ride real nice if you take 10 hours it's even better.
I thinking of doing the National Park to Park Loop