Volvon Village on Mallory Creek
Mortar Count: 715
Open
Upper Welch Creek Road
Mortar Count: 5
Open
West Ohlone Rocky Ridge
Mortar Count: 17
Open
ALA-60 at Crow Canyon Road and Castro Valley Boulevard
Mortar Count: 44
Open
Wildcat Creek Cupule Rock
Alvarado Park
Mortar Count: 2
Open
Williams Gulch
Mortar Count: 2
Open
Blue Oak Trail
Mortar Count: 16
Open
Briggs Creek below Alma College
Mortar Count: 25
Open
Canada del Cierbo
Mortar Count: 28
Open
Canyon Milling site
Mortar Count: 29
Open
Canyon Trail Park Petroglyph Boulder CA-CCO-152
Mortar Count: 20
Open
Chinese Tree of Heaven
Mortar Count: 18
Open
Diablo Grande Cave
Mortar Count: 9
Open
Don Edwards Preserve
Mortar Count: 4
Open
Elephant Rock
Mortar Count: 1
Open
Evergreen Valley Cupule Rock on Silver Creek
First Terrace
Mortar Count: 31
Open
Gossip Rock
Mortar Count: 5
Open
Lake Del Valle, Campsite 74
Mortar Count: 1
Open
Los Vaqueros Log Cabin Village
Mortar Count: 60
Open
Lower Volvon Village
Mortar Count: 200
Open
Lynch Canyon Village
Mortar Count: 51
Open
Mallory Creek Village
Mortar Count: 45
Open
Manhattan Trail–Black Diamond Mines
Mortar Count: 1
Open
Manzanita berry grinding slick with one cupule
Mid-Walpert Village
Mortar Count: 32
Open
Mira Vista Park
Mortar Count: 10
Open
Monte Bello Open Space–headwaters of Stevens Creek
Mortar Count: 12
Open
Pena-Vaca Adobe
Mortar Count: 20
Open
Pine Canyon #1
Mortar Count: 2
Open
Rock City
Mortar Count: 13
Open
Round Valley Village
Mortar Count: 317
Open
Silva/Kellogg Lower
Mortar Count: 2
Open
Stone Corral
Mortar Count: 33
Open
Stromer Spring
Mortar Count: 25
Open
Tolenas Springs Village
Mortar Count: 41
Open
Upper Pond Village Creek
Mortar Count: 10
Open
Upper San Leandro Reservoir
Mortar Count: 8
Open

Feature: Cupules

WestOhloneRockyRidge1

West Ohlone Rocky Ridge

West Ohlone Rocky Ridge17 bedrock mortars and 20 cupulesElevation 1958 ft.Thank you Jeff! Another great discovery. We passed within 50 yards of this site at least three times without noticing it.Bob heads toward the site. There are mortars in that pile of rocks straight ahead of him down the hill.A fine example of a rock […]

CdC3

Canada del Cierbo

Canada del Cierbo28 bedrock mortars, cupules/anvils, and middenLess than 1/2 mile from Interstate 80 off Cummings SkywayElevation 208 ft.Thanks to Joel for leading us here.Archaeological analysis of this site recovered charcoal and bone more than 4,000 years old. Midden at this site may be from N. C. Nelsons Crockett Mound (No. 254).The expedition heads toward […]

Manzanita-slick

Manzanita berry grinding slick with one cupule

Manzanita berry grinding slick with one cupule.

WildcatCreek

Wildcat Creek Cupule Rock

Wildcat Creek Cupule Rock20+ cupules and incising on a blueschist boulder in Wildcat Creek.Elevation 285 ft.Another cupule rock on Wildcat Creek. Could this rock in the middle of the creek have had something to do with fishing magic?A closer view of the cupule rock.Photograph by Bob Bardell.

MREast4b

Canyon Milling site

Canyon Milling siteTwenty-nine bedrock mortars, three probable bedrock-mortars.Ten small mortars on one rock could be considered cupules.Elevation 1477 ft.Our name for this site comes from Table 1 of the 1992 report Evaluation, Request for Determination of Eligibility, and Effect for the Los Vaqueros Project.A partial view of the site.Photograph by Bob BardellA closer look at […]

MidRidgeVillage

Mid-Walpert Village

Mid-Walpert Village32 bedrock mortars, rock wall alignments, numerous cupules and grinding slicks.A low, stacked-rock rectangle on a slope just below the crest of Walpert Ridge dominates this site. Could it have been a sheepherder’s corral? What, for paralyzed sheep? So who would have stacked these rocks if not the Yrgin residents of the small village […]

WillG2

Williams Gulch

Williams Gulch2 bedrock mortars and 2 cupulesElevation 1369 ft.Jeff has a way of finding bedrock mortar rocks in remote locations.The mortar rock here sits on a little shelf above Miller’s Creek.Another view of the mortar rock.A closeup of the rockPrevious two photographs by Jeff Green.This site is on private property. Secure permission before visiting it.

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 […]

MiraVistaPark2

Mira Vista Park

Mira Vista Park10 bedrock mortars and 60+ cupules on a chlorite blueschist boulder near Baxter Creek.Elevation 116 ft.See Canyon Trail Petroglyphs for more details about cupule petroglyphs. Also 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. 254-55 (1986). […]