Lake Crescent: Jasper Rockhounding in Clallam County, Washington

Updated June 2026

Lake Crescent is a mapped rockhounding spot in Clallam County, Washington. Reported finds include jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Clallam County
State: Washington
Nearest road: Spruce Railroad Trail
Coordinates: 48.07955, -123.93053

Geology at Lake Crescent

This spot sits on Crescent Formation, pillowed, mapped as basalt flows and flow breccias and crescent formation that formed roughly 56 to 34 million years ago. Volcanic ground like this is where agate, jasper, and other chalcedony typically form, filling old gas pockets and fracture seams in the flow rock.

Mapped unit: Crescent Formation, pillowed
Age: 56–34 Ma (Eocene)
Rock types: basalt flows and flow breccias and crescent formation
Elevation: 2,060 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 Lake Crescent

Best months: April to October. Typical highs run 68°F in midsummer and 35°F in midwinter, with winter lows near 27°F.

Climate normals: NOAA 1991-2020 monthlies, ELWHA RS station (16 mi away), adjusted for elevation.

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

Washington Geological Survey (DNR)
Stonerose Interpretive Center — Visit & rules
BLM Spokane District
Community submissions reviewed against published agency rules

Found at Lake Crescent

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

Jasper Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Lake Crescent.

Lake Crescent FAQ

Where is Lake Crescent?+

Lake Crescent is in Clallam County, Washington, at 48.07955, -123.93053. Nearest road: Spruce Railroad Trail.

What rocks and minerals can you find at Lake Crescent?+

Lake Crescent is reported to produce Jasper.

Is collecting allowed at Lake Crescent?+

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 Lake Crescent?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Lake Crescent?+

The most comfortable months at Lake Crescent are April to October.

How do I get to Lake Crescent?+

Open the directions link to navigate to 48.07955, -123.93053 in Google Maps. The nearest road is Spruce Railroad Trail.

More rockhounding in Washington

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Open Lake Crescent on the map

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