I started again last January (at age 55.5) after a 10-year hiatus. First ride on the TREK hybrid was 8 miles and took me almost 45 minutes. By May I was doing 20 on the hills around the area and 40 miles on the rare flat-landers' ride I do about twice a month with an old high school buddy who lives about 35 miles away. My best ride of last year was 48 miles in 3 hours 12 minutes. If this old fat guy can do it, I imagine most others can too. Hang in there and just add a half mile or mile on each successive ride. You'll be doing 20, 30 and 40-milers before you know it.