Well yesterday was my first "Speed Day" but it was mostly an uphill day. The workout said 4 X 100 m. I'm sure I did more than that but the whole part I was running wasn't necisarily uphill so it evens out. I was in upper Bidwell Park running up and down the North Rim Trail. Here is a PDF map: MAP. It was very rocky which made it a bit exciting. It was about 102 degrees here yesterday which isn't as bad as southern California but still pretty hot. After going up and down the trail a couple of times I could tell a big contrast in the temperatures at the parking lot to the top of the hill where I turned around. I'm talking 5-10 degrees cooler at the bottom of the hill. I'm not sure the physics of that, but it was interesting.
While running I was ran off the road by an out of control mountain biker. Luckily I am as sure footed as a mountain goat.
I think that this workout was meant to build leg muscle mass because it wasn't really long enough to develop endurance.