After comparing my reroute idea with the closed areas there is overlap
Unfortunately this means a "simple" reroute is not possible. The reroute gets within a mile of the fire perimeter, so even if it wasn't closed I'd still recommend steering clear. We're currently under record high temps and single digit humidities, the fire is only 4% contained and expected to grow despite 420 personnel working it.
The group start is off this year
Mother nature has her own plans.
Everything aside from Brian Head is open, so if you made plans there are plenty of trails to link up. Just steer clear of Brian Head.