Guy Sutton was gracious enough to share this with us.
Check this link for Loop 1 info.
Besides bearing evidence of Guy’s superhuman badassery, this link can help provide you with some more course insight*, including a GPS’d route of the tricker singletrack sections in May Valley.
Use it for good, not evil.
*note: this track shows some minor detours, such as an optional jaunt into Idyllwild for refreshment. As a reminder, detours to public places are fair game, but you’ll have to ride every bit of the Enduro route to complete it. ie, go to the grocery store and rejoin the route at the same intersection you departed from.
Dig?
SoCal Bikepacking 
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