We do a couple of runs from Orwood up to Old Town Sac and stay over night. One of my running buddies ask about going beyond the Sac area up river. I have been as far as where I-80 goes over the river. So the question is how far can one go up river safely from the Sac area and is there anything worth seeing or doing up that way? Gas, food, accommodations, etc.? Thanks for the advice.