ALA-481
Mortar Count: 2
Open
Alvarado Park
Mortar Count: 2
Open
Black Hills Trail
Mortar Count: 3
Open
Camp Confluence
Mortar Count: 1
Open
Canyon Trail Park Petroglyph Boulder CA-CCO-152
Mortar Count: 20
Open
Chitactac
Mortar Count: 75
Open
First Terrace
Mortar Count: 31
Open
Lower Volvon Village
Mortar Count: 200
Open
Lynch Canyon Rancher Petroglyph Rock
Mortar Count: 13
Open
Mira Vista Park
Mortar Count: 10
Open
Monte Bello Open Space–headwaters of Stevens Creek
Mortar Count: 12
Open
Ring Mountain #2
San Marin
Stromer Spring
Mortar Count: 25
Open
Sulphur Spring
Mortar Count: 5
Open
Upper Crow Creek
Mortar Count: 3
Open

Feature: Petroglyphs

Black-Hills-Trail-Possible-PCN

Black Hills Trail

Black Hills Trail.Three bedrock mortars, a possible PCN, and a slick.Elevation 1520 ft.Pecked curvilinear nucleated petroglyphs are not supposed to occur in Contra Costa County.We’re not so sure.

StromerSpring

Stromer Spring

Stromer Spring25 bedrock mortars, cupules, and PCN-style petroglyphsElevation 2023 ft.We used to drink from Stromer Spring in the not-so-distant past. The Park District warns against doing it now.A nice, single-track trail passes near here. We followed it many times without ever stopping to examine these rocks. If we considered them at all, we dismissed them […]

CampConfluence

Camp Confluence

Camp Confluence1 bedrock mortar on the north fork of Kaiser Creek.There’s supposed to be a petroglyph boulder on the upper reaches of Kaiser Creek, but we’ve never been able to find it. We did find this single mortar and little camp though.

SulphurSpring2

Sulphur Spring

Sulphur Spring18 cupule rock; 5 bedrock mortars; slick 70′ away.Elevation 722 ft.The cupule rock. The use of cupule rocks here and elsewhere is, for the most part, shrouded in mystery. See Cupule Petroglyphs in the Diablo Range by E. Breck Parkman in the Journal of California and Great Basin Anthropology Vol. 8, No. 2, pp. […]

CanyonTrails

Canyon Trail Park Petroglyph Boulder CA-CCO-152

Canyon Trail Park Petroglyph Boulder20+ bedrock mortars and 175+ cupules on one chlorite blueschist boulder.Elevation 141 ft.CA-CCO-152This rock is in Canyon Trail Park on a branch of Baxter Creek. Baxter Creek flows into the Bay near Stege, a long-vanished neighborhood on the old shoreline of San Francisco Bay, northwest of Albany hill. Some of the […]

CrowCreekPCN

Upper Crow Creek

Upper Crow Creek3 bedrock mortars and a PCN.This sure looks like a Pecked Curvilinear Nucleated petroglyph to us. If it is, does that mean this site had some special significance?

Chitactac1

Chitactac

Chitactac75 bedrock mortars and a petroglyphBay Area Rock Art Research Association (BARARA) members view the restored village site.Remember: Stay on the pathway and no daylighting!

1stTerraceCupuleRock

First Terrace

First Terrace31 bedrock mortars, a 23 cupule rock, and 3-4 housepits.Elevation 775 ft.This site and the Kitchen site are actually on the same terrace, separated by a creekbed, but because we discovered and named the Kitchen site first, we called this site the “First Terrace.”A view of the First Terrace. The cupule rock is near […]

LowerVillageNipple

Lower Volvon Village

Lower Volvon Village200 bedrock mortars and a 32 cupule rock. A second cupule rock also at the site. Numerous housepits.Elevation 1445 ft.This is one of the largest collections of bedrock mortars in California, and it is only about a mile and a half away from the main Volvon Village.The Lower Village sits on the side […]

LCYN5

Lynch Canyon Rancher Petroglyph Rock

Lynch Canyon Rancher Petroglyph Rock13 bedrock mortars and modern petroglyphs on two rocksElevation 539 ft.This camp sits near the headwaters of the North Fork of Lynch Creek.A large petroglyph panel may be found on this mortar rock.A closer look at the mortars.A nice workstation. Note the layout of the mortars and their size differences.Photograph by […]