Okay, so you guy's have said that TW would customarily leave his home in the Monument area, ride up Mt. Herman Road to the point where the trail hits the road, and then ride down the Limbaugh Canyon trail, right?
And we know that DN was caught menacing other cars on Mt. Herman Road.
What if the altercation between TW and DN (or whomever) started on Mt. Herman Road, as TW was riding up? DN might have come up behind TW going up the road, and gotten frustrated that he couldn't get past, or whatever, and started threatening TW with the hatchet and it starts getting ugly. TW might have even hit the bicycle tire with the hatchet, causing TW to have a flat.
As soon as TW reaches the trail to Limbaugh Canyon, he starts up that trail. (I believe the trail goes uphill before it reaches a ridge where it starts the descent toward Limbaugh Canyon, is that correct?) But the bike has a flat, and TW has to ditch the bike and start running up the trail to get away from DN. Somewhere along the way, TW loses a shoe, either before or after he ditches the bike, depending on which is closest to the road. TW could be injured at this point, either from the hatchet or the .22. TW runs off the trail downhill, down into the canyon, could be further injured, TW catches up and kills him. Then covers his body with leaves and branches in an effort to conceal the body.
Based upon what you know, is this a possible scenario?