I've seen rides where riders are asked to submit their data from Polars, GPS units, whatever... I assume the ride organizer looks at all the numbers and makes some determination.

Did you see this for the Hilly Hundred?

http://www.hillyhundred.org/PDF_Files/Hills.pdf

Those aren't hills; most of those are rollers.

Remember max incline could be from one spot on the hill, not the entire hill. It would be like saying our Mount Diablo is a ten mile 18% climb, just because the last tenth of a mile is 18%.

Veronica