Gorgeous park. I had entered the 8-mile, but when the first lap ended, I decided to finish the 4-mile instead. The hill between miles 2.5-3.5 was significant and difficult. I had to stop (not just walk - stop) two or three times on the way up. The same hill would have been between miles 6.5-7.5 during the second loop. I didn't think I could do it.