I handful of summers ago I was kinda out of shape, just doing my lazy, flat 8 mile round trip M-F commute. I just started heading out along the train route, figuring there were a few stops before 100 miles where I could bail out and catch a train home. It wasn't 'til the third attempt that I made it all the way to Tumwater. All were nice rides, though.
The one I finally completed that summer, I ate way worse than that at about the 40 mile point. Greasy cheeseburger, fries and shake.