I was pretty sure that many of the unmarked trails were from other racers leaving that CP to go on to the next one (there were a few that were legit trails that existed before today, though)
I was thinking of #6, where I could drive a car to it. In hindsight, #28 was my own fault for not transferring the hiking trail from the park map to the USGS map (and choosing a poor attack and failing to correctly read the features and misjudging distance).
We also cut to #7, but took that nice fisher/hunter/beer drinker trail back to the TA.
On the upside, bushwhacking to #6 made it possible to find someone's pair of dropped gloves.