I am have done very few trail runs...like 2. The half marathon I ran last weekend was on trails and then this weekend we decided to explore another trail that is not far from our house. It took two miles to get there and then we were on our way. The terrain was never the same.
I thought it was most fun crossing over all the rivers.
We turned around about the 6 mile mark...because we were wimps and did not want to get our feet wet.