Once a week I've been running a 7.5 mile loop through cougar mountain. Usually I walk up the hills and run down them or on the flat stretches.
This week I logged my fastest time yet. The run actually felt good. Usually I get tired and I have to push my self. This time I did get winded, but I didn't get tired. I also managed to run up the hills longer than usual.
Improving my trip times has a self-reinforcing benefit. Short trip times mean that my runs are less of a commitment, which lets me sneak in a few more runs every now and then.