The courses are lap courses, meaning that you will do a short loop multiple times. Not as boring as it might sound because you’ll see other runners coming and going, and you pass the start/finish and bathrooms each lap. The paved, urban run/bike trail is flat and largely shaded. These are open courses, and include two street crossings each lap. You are responsible for crossing safely. 50K will be 14 laps plus one mini lap, Marathons 12 laps, Half-Marathon 6 laps, 10K is 4 smaller laps, and 5K is 2 smaller laps.