This route covers everything on Trex Map except a very small piece of Yellow.
It does the top half of Purple Half Pipe twice. Print directions with map and you can't go wrong.
My estimate is between 10-11 miles.
From Horse Stable
Enter Brian’s Trail
Left Half Pipe (Do All Of Half Pipe) 
Straight Brian’s Trail To Kill Dozer :jawdrop:
Left Brian’s Trail
Right Buck Run
Right Buck Run
First Left Buck Run
Straight Broken Arrow :thumbsup:
Right Fireman’s Trail
Uturn At Covered Bridge
Ride All Of Fireman’s Trail
Left Border Trail Segment
Straight Half Pipe
Right Half Pipe
Cross Brian’s Trail
Left Brian’s Trail (Midway Down Half Pipe)
Brian’s Trail Back To Horse Stable
:beer: