Some of mine is "back in the day." Having said that....I once rode from Sebago Lake in ME to my home in NE CT in about 2 1/2 days. It was between 250-300 miles. I don't know what the longest day was. I currently do a 6.5 mi. TT a couple times a month. And, these days, my rides are generally 30-40 miles. I've done a solo Century at 16 mph. My best TT was at 19.1 mph (at age 73) and I generally ride 14-16 mph these days.