NR, I just (properly)read the endomondo challenge. The rules are strange.
I guess you get bragging rights for finishing first, but NO guarantee for winning! The winners are picked at random from lots earned by each mile ridden.
So, even though you're first, you only have a slightly better chance of winning than the 2nd place rider AND you have a not very good chance of winning when thrown in with all other riders.

I don't like it.

I'm mulling over a late in the season attempt at the 185 mile Monument to Monument to Monument. (Baltimore-DC-Boonsboro)
I've got this thursday off work and I might just blow outa B'more at 5AM. Waiting on weather.