Genoa: Calcite & Celestite Rockhounding in Ottawa County, Ohio

Updated June 2026

Genoa is a mapped rockhounding spot in Ottawa County, Ohio. Reported finds include calcite, celestite, dolomite, fluorite, marcasite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Ottawa County
State: Ohio
Nearest road: Main Street
Postcode: 43430
Coordinates: 41.50796, -83.35441

Geology at Genoa

This spot sits on Lockport Dolomite, mapped as dolostone that formed roughly 445 to 425 million years ago. Carbonate rock like this is the classic host for lead, zinc, and fluorite mineralization, which typically follows old cavities and replacement zones.

Mapped unit: Lockport Dolomite
Age: 445–425 Ma (Llandovery to Ludlow)
Rock types: dolostone
Elevation: 490 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Genoa

Best months: March to November. Typical highs run 85°F in midsummer and 34°F in midwinter, with winter lows near 21°F.

Climate normals: NOAA 1991-2020 monthlies, TOLEDO METCALF FLD station (7 mi away).

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Genoa

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Genoa.

Across the state line from Genoa

Genoa is close enough to the Ohio border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

William C. Sterling State ParkMonroe County, Michigan · 29 mi away

Genoa FAQ

Where is Genoa?+

Genoa is in Ottawa County, Ohio, at 41.50796, -83.35441. Nearest road: Main Street.

What rocks and minerals can you find at Genoa?+

Genoa is reported to produce Calcite, Celestite, Dolomite, Fluorite, Marcasite, Pyrite, Fossils.

Is collecting allowed at Genoa?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Genoa?+

A rock hammer, gloves, and safety glasses cover old mining-district ground. Stay out of shafts and adits; the best specimens typically come from dump piles.

When is the best time to visit Genoa?+

The most comfortable months at Genoa are March to November.

How do I get to Genoa?+

Open the directions link to navigate to 41.50796, -83.35441 in Google Maps. The nearest road is Main Street.

More rockhounding in Ohio

See all 38 Ohio spots →

Open Genoa on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.