Explore › California bottle digging
Black Point: Petaluma River mouth bridges
BOTTLE DIGGING
GRAY AREA
INFERRED
Where: California · North America · approx. 38.1, -122.5 (vicinity only)
Why this spot: 1870-1915
What turns up: Rail-era bottles, duck-club flasks
Access: Gray area.
CDFW fishing access - no digging on the access itself; foreshore below MHT gray.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.