We were in Colorado in June of this year for vacation and drove up Pikes Peak this year and must say it is the best way to see the mountain at your leisure although there were some people that drove like it was a race to the top and didn't realy seem to care about the beauty around them.
We did the cog railway a couple of years before but enjoyed the drive up much more.
It just started to snow as we were leaving the summit and by the time we were down we were in the middle of a thunderstorm.
If I remember corectly the cost depends on the number of occupants in the vehicle but no more than $35 per vehicle.
I also remember reading that by 2012 it is going to be paved all the way to the top.