Originally Posted by
spdrcr5
Since I just finished a very mountainous ride and normally ride rollers and short steep climbs all the time... long sustained mountain climbs are night and day more difficult than rollers. I had one climb that lasted 8 miles, gained 2,700 feet and was an absolute killer with grades avg 20-40%... give me rollers any day!

The descent was riddled with climbs throughout it as well.
my ride from last weekend.

A 20% grade for one mile gains 0.2 * 5280 = 1056 vertical feet. Keep that up for eight miles, and you've gained 8,448 feet, which is significantly more then the 2,700 feet you claimed.
2,700 feet over 8 miles averages out to 6.4%. Sounds like a fun climb to me.