GPS tracks can be really noisy. The routes that CalTopo suggests when you add a line can also be noisy. Trails are often not where the maps and CalTopo say they are. The last few months, I’ve been zooming in with CalTopo’s Google Satellite layer and looking for where the trail actually is. But you can’t always see the trail. And sometimes there have been trail changes since the last satellite image. (Google Satellite doesn’t show the recent trail repair and re-routing on the Shepherd Pass trail.)
