Nice thing about Lighthouse, if you do the "flat" route and that term is relative... its basically out and back so if you are struggling, you can just turn around at any point and head back. Frankly the ride out pass the Lighthouse (which I guess is the point of the ride) can be a real drag - wind drag that is. Alot of folks can't handle the wind (which can gust up to 35 - 40 mph) and turn around at the last rest stop before the Lighthouse. Makes the ride around 70 miles I think.