[IZ] Marin Headlands Bike, 7/29

Dist: about 20 miles
Time: about 1:53
Avg: 10.6 MPH

HR Avg: 133
HR Max: 162

Through the Presidio, across the bridge, up to the headlands, down the other side, through the tunnel, and home across Crissy Field.

I think going up the headland my HR averages around 150.

I took it pretty slowly after Crissy Field; I think my HR was 115 or so for the last 10 min of the ride.