Here is my sprint hill at the park. It has a steep side and then a long side. I went out today and ran about 1 mile to warm up and then ran sprints on the steep side (where the arrows are). I am standing far away but to give a perspective on the size of the hill I circled a truck next to the hill.
As soon as I reached the bottom I sprinted back up so the rest was short. It was nice to be outside especially since the weather is perfect to run in....and who knows how long this will last with winter around the corner!