For the Jungfrau-Marathon, describe the main marathon course characteristics, including its length and total elevation gain. Additionally, identify the names and distances of the races held on Friday, and state the start location for the 'Harder Run' event.
Navigate to the 'Course' page under the 'Marathon' dropdown. Extract the length and total elevation gain of the Jungfrau-Marathon course. Navigate to the 'Friday Races' page under the 'Friday Races' dropdown. Identify the names and distances of the races listed for Friday. Navigate to the 'Harder Run' page. Identify the start location for the 'Harder Run' event. Synthesize all gathered information to answer the proposed task.
State the length of the Jungfrau-Marathon course (42.195 km). State the total elevation gain of the Jungfrau-Marathon course (1'953 metres). List the names and distances of the races held on Friday (e.g., Jungfrau-Marathon Relay 17.5 km, Jungfrau-Marathon Relay 24.7 km, Jungfrau-Marathon Team Run 42.195 km). State the start location for the 'Harder Run' (e.g., Interlaken Ost). Ensure the answer combines information from all specified sections.