I head up to Pipsqueak Pinnacle occasionally for raptor monitoring, and from the High Peaks Trail, there isn't really a clearly defined access trail that I know of. The easiest approach I've come up with is to walk up the High Peaks Trail until you get at a 90-degree angle from the ridge that Pipsqueak (and Snout to the north) are on, then scramble upslope from the trail, near a decaying bit of log on the right side... You can pretty much avoid brush on the way up to the ridge, but it is steep. Once on the ridge, a faint route threads you through the chaparral to get to Pipsqueak... As Munge says, it isn't very brushy compared to other formations.
