New River Area Streams: Agate & Chalcedony Rockhounding in Maricopa County, Arizona

Updated June 2026

New River Area Streams is a mapped rockhounding spot in Maricopa County, Arizona. Reported finds include agate, chalcedony, jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Maricopa County
State: Arizona
Nearest road: West New River Road
Postcode: 85087
Coordinates: 33.91942, -112.10474

Geology at New River Area Streams

This spot sits on volcanic rocks, mapped as basalt, andesite, and dacite that formed roughly 41 to 7 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: volcanic rocks
Age: 41–7 Ma (Late Eocene to Late Miocene)
Rock types: basalt, andesite, and dacite
Elevation: 2,100 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 New River Area Streams

Best months: October to April. Typical highs run 105°F in midsummer and 66°F in midwinter, with winter lows near 43°F. Monsoon storms peak in July and August and can flood washes fast.

Climate normals: NOAA 1991-2020 monthlies, CAREFREE station (14 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 Arizona — Recreational Mineral Collecting
Arizona Geological Survey
Arizona State Land Department recreation permits
Community submissions reviewed against published agency rules

Found at New River Area Streams

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 New River Area Streams.

New River Area Streams FAQ

Where is New River Area Streams?+

New River Area Streams is in Maricopa County, Arizona, at 33.91942, -112.10474. Nearest road: West New River Road.

What rocks and minerals can you find at New River Area Streams?+

New River Area Streams is reported to produce Agate, Chalcedony, Jasper.

Is collecting allowed at New River Area Streams?+

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 New River Area Streams?+

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 New River Area Streams?+

The most comfortable months at New River Area Streams are October to April. Monsoon storms peak in July and August and can flood washes fast.

How do I get to New River Area Streams?+

Open the directions link to navigate to 33.91942, -112.10474 in Google Maps. The nearest road is West New River Road.

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