there are several trails near my home.
I stay on asphalt 95% the time, but dont ride a 100 % road bike.
I average 2 days a week for 45 minutes. I ride about 5-10 miles. I might change 2000 feet in a ride so my ride is up and down.
I do have an alternative flatter rout and I guess it changes at least 750 feet. Here's the video of that path ...
http://youtu.be/k1ew4UDqfgY
oh yea, check out the lightning stike at the very end... three bolts become one...