Depends on what kind of boat your running, and where you want to shoot up. I'd recommend going all the way up the herrick to the falls. 126k one way. We made it up our first attempt this past july. Just don't screw up and get pinched down into the Mcgregor falls you'll fold your boat like a taco.
There are a couple of us interested , would most likely be 4 or so boats if we can get our ducks in a row yet this year. Will the water stay constant now till the end of the year , barring a huge rainfall or does it get where it's not runnable ? Herrick falls is one of the places we were hoping to go . Boats are all small shallow water capable and drivers are very experienced in rock hopping. Thanks for your reply, if we get it together maybe you could join us , show us your area.
Join meanchicken forum, you'll prob have better luck getting information on new areas you'd want to boat then S&M