At the end of my driveway starts a winding climb up to 9200 ft altitude on a jeep road. This morning I was pressed for time so I decided to do the climb cutting some of the switchbacks to see if I could get 2 laps before my wife left for work. At 9000ft it was 43 degrees which helped a ton in holding my HR down.
8 miles total with 2010 feet of climbing/ average pace 9:13 per mile. Avg HR 144 (30 beats below LT)/ max 161.