Some years ago, I was on my longest ride so far (back then) since buying my bike and despite feeling crappy the first four miles or so and the trail being bad at the beginning, I was feeling pretty proud of myself as I approached the midpoint. On the short incline up to the midpoint, I was passed by a woman probably 20 years or more my senior (so 70+), wearing (I am not making this up) a flowered dress and a straw hat, riding what I think was a 3-speed, and not sweating a bit.