Send the following on WhatsApp
Continue to ChatCoal Mine Ridge Map - San Mateo County, CA https://www.yellowmaps.com/usgs/topo.cfm?map=ca-221273-coal-mine-ridge
Coal Mine Ridge Map - San Mateo County, CA https://www.yellowmaps.com/usgs/topo.cfm?map=ca-221273-coal-mine-ridge