I have a retreat to go to in Newport Beach this weekend. I have all day Friday to get there from near Valley College in Van Nuys so I'm thinking of riding my bicycle. Bike Metro gives me a 65 mile route. I've been biking pretty regularly for the past 6 months on my Giant Cypress but my longest ride has been 35 miles, with lots of 20-25 mile days. I'm 56; I'm not real fast but my stamina is pretty good. The route looks pretty flat or downhill and includes around 20 miles of bikepath. Am I crazy to try it? My husband will be driving down and can rescue me if I need it.