Just a little tip: I ran cross two weekends ago and considering the beautiful weather and decent flow I figured someone else would certainly be there. Man was I wrong. As you wil find out, the canyon is seriously out in the middle of NOWHERE. Turned out it was just me and my buddy, so we ended up hiking/jogging the shuttle, which is seriously bitch (we didn't know about the trail on the canyon rim so we ended up going back out to the highway and then in and out both dirt roads- sucked even worse). It took us 2.5 hours and was about 9.5 miles. So if you're only taking one car, I would definitely hang around Steamboat for a while to see if you can find someone else that's going down there to run shuttle with. Good luck.
Oh yeah and just in case you were wondering, it was still worth it. Very cool run.
The attendant at Ted's Place: "And from now on if I'm working when you come in here, you take as much Nacho Cheese for your burrito as you want- it's on me (wink)."