Manti: Epsomite Rockhounding in Sanpete County, Utah

Quick details

Access

Public area

County

Sanpete County

State

Utah

Nearest road

M Mountain Trail

Postcode

84642

Coordinates

39.26452, -111.61886

Geology at Manti

This spot sits on ground mapped as Colton Formation that formed roughly 56 to 34 million years ago. Fresh exposures, cuts, and drainages are typically the most productive places to look on ground like this.

Mapped unit

Colton Formation

Age

56–34 Ma (Eocene)

Elevation

5,930 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 Manti

Best months: March to November. Typical highs run 86°F in midsummer and 37°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, MANTI station (1 mi away), adjusted for elevation.

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.

State guidance last verified: April 1, 2026

• BLM Utah — Rockhounding overview
• Utah Geological Survey — collecting guidelines
• SITLA — surface use rules
• Community submissions reviewed against published agency rules

Found at Manti

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

• Epsomite