Pilgrim Haven Natural Area: Lightning Stone & Quartz Rockhounding in Van Buren County, Michigan

Plan your visit

Generally open to casual rockhounding

County

Van Buren County

State

Michigan

Postcode

49090

Coordinates

42.35267, -86.29870

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Best time to visit Pilgrim Haven Natural Area

Comfortable months (45 to 90°F highs)

Best months: March to November. Typical highs run 80°F in midsummer and 33°F in midwinter, with winter lows near 22°F.

Climate normals: NOAA 1991-2020 monthlies, S HAVEN station (3 mi away).

Geology at Pilgrim Haven Natural Area

This spot sits on Coldwater Shale, mapped as shale that formed roughly 360 to 325 million years ago. Sedimentary layers like these are where fossils are typically preserved, and fresh exposures after rain or in active cuts tend to produce best.

Mapped unit

Coldwater Shale

Age

360–325 Ma (Mississippian)

Rock types

shale

Elevation

620 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.

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.

State guidance last verified: April 1, 2026

• Michigan DNR, Rockhounding rules
• Michigan Geological Survey
• Isle Royale National Park, Rules
• Community submissions reviewed against published agency rules