Comb Ridge: Arizona Ruby Garnet Rockhounding in San Juan County, Utah

Updated June 2026

Comb Ridge is a mapped rockhounding spot in San Juan County, Utah. Reported finds include arizona ruby garnet. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: San Juan County
State: Utah
Nearest road: Comb Wash Road
Coordinates: 37.30312, -109.65648

Geology at Comb Ridge

This spot sits on Moenkopi Formation, mapped as sandstone mudstone that formed roughly 250 to 245 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit: Moenkopi Formation
Age: 250–245 Ma (Early Triassic)
Rock types: sandstone mudstone
Elevation: 4,430 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 Comb Ridge

Best months: February to May. Typical highs run 96°F in midsummer and 43°F in midwinter, with winter lows near 19°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, BLUFF station (6 mi away).

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 Comb Ridge

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

Arizona Ruby Garnet Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Comb Ridge.

Across the state line from Comb Ridge

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

NW San Juan CountySan Juan County, New Mexico · 67 mi awayChert, Garnet, Jasper

Comb Ridge FAQ

Where is Comb Ridge?+

Comb Ridge is in San Juan County, Utah, at 37.30312, -109.65648. Nearest road: Comb Wash Road.

What rocks and minerals can you find at Comb Ridge?+

Comb Ridge is reported to produce Arizona Ruby Garnet.

Is collecting allowed at Comb Ridge?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Comb Ridge?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

When is the best time to visit Comb Ridge?+

The most comfortable months at Comb Ridge are February to May. Summer heat here is intense, so carry more water than you think you need and work the early morning.

How do I get to Comb Ridge?+

Open the directions link to navigate to 37.30312, -109.65648 in Google Maps. The nearest road is Comb Wash Road.

More rockhounding in Utah

See all 246 Utah spots →

Open Comb Ridge on the map

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