I just went through some of my stats to see how I stack up. This is what I found close to the 508. I for sure wont ever be riding in an endurance race of that caliber.
18.1 avg speed
35,237 elevation gain
Spread over 31 days of the month of August average ride was 26.4 miles and I was toast at the end of the month.
"Gentlemen, it is better to have died a small boy than to fumble this football"