NPS Visitor maps & USFS Visitor maps
These are great maps and dispay in caltopo pc and mobile, avenza (I think), backcountry navigator free and Gaia.
If they are free in BCN free I woudl think access to the data layer must not cost much???
can you please add this to the onlin map list or even sell on your store for offline?
As a test type in "lake stampede, ca" on any current locus map then look on caltopo usfs visitor map and see the difference.