I love the Northern section, but sometimes a good ride can fall apart rapidly. I was doing some exploring (ok, I had no idea where I was going) when I ended up in a grass field by a road - probably the same road with the parking lot. I took a teal colored trail back into the park. What a mistake! That was the longest hike-a-bike I've done in years. Nice overview at the top but a lot of pain to get there!