If you haven't been training, then it may be a little late for this weekend's 7 Sisters Trail Race in Amherst. As the race website promises:
"Very scenic overlooks of the Pioneer Valley with views of the University of Massachusetts, Amherst College, Hampshire College and the Town of Amherst, as well as a beautiful view of the Connecticut River and Northampton to the west."
Only problem is, those views come while humping up and down very rocky terrain for 12 miles.
If you need a bit more time to get in shape, there're always the races at the Pineland Farms Trail Challenge, in New Gloucester, Maine.
Those races are bit longer, at 25 kilometers, 50 kilometers, and 50 miles. And as the web site warns: "The trails are wide and non-technical, but very hilly. Although there are no major climbs the rolling terrain is unrelenting."