In order to do analyis on the data I had to take some steps preparing it. First I created a TIN using the contours and the height data. Then using the TIN I created a raster coverage of the slope of the TIN. The TIN and slope analysis both required 3D analyst. Then I attempted to somehow map the raster slope data to the vector trails data. This didn't work. Instead, I made the line segments small so they wouldn't cross over too many contour lines, then I used the height values from the contours that the end points fell into along with the length of the line to derive the slope of the line. This is not a very good measure of the slope but it is reasonable. Then I turned on Network Analyst for the computing of routes for different levels of mountain bikers. In order to figure out what were reasonable routes I picked usually starting and ending points. One of the problems with Network Analyst is that with a starting point and, a  place to go, and then return to the original place, is that it would travel the same route back. Mountain bikers are notorious for not wanting to do the same trail twice in a ride if they can help it. To fix this I added an extra node that the biker might go through.
            The routes consisted of a few things. A starting point which also served as an ending point. (People usually return to their vehicles) and usually 2 outbound points. The 2nd as mentioned above to prevent returning the same route you came. The other important factor was what mountain bikers are interested which are the trails. They will avoid the roads when at all possible, however, inevitably they get used. As a result of this observation I weighed the roads very heavy compared to the access roads and the trails. I did this by multiplying a constant times the slope for the road segments. It proved fairly effective.