I had been trying to ride mostly on the road last year for training and to build my endurance up. I get tired of doing the same roads down in the Foothills area and the variations. I had found a nice route down through the casino area to add a few miles and some different scenery.
Lately I have been hitting the trails behind the house. It is easy to get an hour or so in. I usually dont wear a heart rate monitor on the trail, I know I am working at a higher rate anyways. I wore one today and found that my hr is a good 10 beats higher just on the single track. Normally I can cruise big ring in the 130-140 area and I was seeing 150 or more out there today. That has to be good for my endurance and race pace since you rarely challenge yourself on the roads that way.
I miss being able to ride up to what was called the helicopter pad. Back when the Foothills was just test roads for heavy equipment there was a helicopter pad at the top of one of the hills. It had a great 5 minute climb and a fast single track descent on it. Quite a bit of fun to do some reps on it to build power.