1000Pks wrote:While never having owned one, my experience with GPS
Non sequitur of the day!
is that they are wildly inaccurate, and I would never go definitively by one.
Oh please. Five trips on that trail match quite well. Comparison of measured map mileage and GPS mileage, on roads, is typically very good, even though the per-mile sampling rate is greatly reduced. I'm not talking about the GPS chipset in a cellphone.
The DPS guide is pretty good by me, and you can look at the maps.
Look at the DPS guide page for NGA. Nobody follows those straight lines. There are now pretty good trails in several of the places. Nobody goes across the basin to NGA as they show; the herd path snakes around the manzanita and scrub oak. Few sane people walk off the overlook as they show, but rather take the switch-backed use trail to the east.
The DPS does send out updates of the guide for members; but many of the descriptions of routes in the printed guide are inaccurate, because they were written long ago. The approach roads may have fallen into disrepair (e.g. Tipton, Clark), No Trespassing zones have sprung up (Granite Mojave), or forest fires and land slides have obliterated trails (Porter east).