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Completed Field Trips and Reports

Our chapter has an active field trip schedule. We've travelled all over the state and even out of state. You can see a list of some of our trips below. Where available, reports are linked to the trip listings.

Lunch at Montara Mt

Lunch at San Pedro Valley County Park Feb 21, 2016


Completed 2018 field trips

Hummer at Loma Hike

  • Jan 1, Año Nuevo State Preserve (Hwy 1 coast-southern San Mateo County)
  • Jan 8, Annual Field Trip Planning Meeting, PCC.
  • Jan 14, Almaden Quicksilver County Park, Plant Communities of the South Bay: Plant Id Walks for Beginners.
  • Feb 12, Dirca walk at Jasper Ridge Biological Preserve, Portola Valley.
  • Feb 17,  Dirca Hike at San Francisco Peninsula Watershed, San Mateo County
  • Feb 18, 2018, Coyote Valley Open Space Preserve, Morgan Hill - Plant Communities of the South Bay: Plant Id Walks for Beginners (Morgan Hill)
  • Feb 19, Dirca walk at Jasper Ridge Biological Preserve (San Mateo County)
  • Feb 24, Coyote Ridge Open Space Preserve, Fragrant Fritillary at Coyote Ridge (Morgan Hill)
  • Feb 25, Hazelnut Trail, Montara Mt., San Pedro Valley County Park (Pacifica)
  • Mar 1-5, Cancelled
  • Sun Mar 4 Lichen Walk at Pedro Point Headlands (Pacifica) (Changed date due to rain)
  • Sun Mar 11 Shooting Stars at Grant Ranch (San Jose)
  • Mar 18 #1:Beginner’s Bird and Plant Identification Walk Series at Lake Cunningham, San Jose
  • Mar 22 Picchetti Ranch OSP, Cupertino
  • Mar 25 Field Trip Planning and brainstorming Potluck & Edgewood Hike and leader training (San Mateo County)
  • Apr 1 Summit Loop Trail, San Bruno Mountain State and County Park
  • April 8 Sweeney Ridge (San Bruno)
  • Apr 29, Cañada de los Osos Ecological Reserve, Gilroy
  • May 5, Wilder Ranch State Park (Santa Cruz)
  • May 5 Loma Fire Hike, x-Rancho Cañada del Oro, rescheduled
  • May 19, Coastal Walk at McNee Ranch State Park (San Mateo County)
  • May 20,  Grass Walk at Los Trancos OSP (Santa Cruz Mountains)
  • May 24 - 29 (Memorial Day weekend) Lava Beds National Monument and McArthur-Burney Falls Memorial State Park (NE CA)
  • Jun 3,  Redwood Walk at Portola Redwoods State Park (San Mateo County)
  • Jun 9,  Night Hike at Pulgas Ridge Open Space Preserve (San Carlos)
  • June 10, Mount Hamilton Road Trip (San Jose)
  • Jun 16, Beginner’s Bird and Plant ID Walk Series at Lake Cunningham Park  (San Jose) Session #2: First Day of Summer
  • July 1-8: Backpacking trips to Mt. Eddy and Big Duck Lake in Russian Wilderness
  • July 20-23 Carson Pass  ̶ Sierra Wildflowers off Hwy 88 (Alpine County)
  • Aug 4-11: Backpacking trips to Little Duck Lake and Campbell Lake (Marble Mtn Wilderness)
  • Sep 23: Beginner’s Bird and Plant ID Walk at Lake Cunningham Park (San Jose)
  • Oct  13 October  Native Plant  Stroll (San Jose)  
  • Oct 14 Berries for Birds: a Beginner’s Plant Id & Habitat Walk @ Rancho Canada del Oro, Morgan Hill.

2017 field trips

Fetid Adder's Tongue, Pulgas Ridge

  • Jan 1, Año Nuevo State Preserve (Hwy 1 coast-southern San Mateo County)
  • Jan 8 St. Joseph's Hill Preserve, Mid Pen Open Space Preserve (Los Gatos) RAIN CANCELED
  • Jan 9 Field Trip Planning Meeting, PCC
  • Jan 14, Dirca Walk, Windy Hill Open Space Preserve (Portola Valley)
  • Jan 22, Fungi Walk, Los Trancos Open Space Preserve (Page Mill Rd)  RAIN CANCELED
  • Feb 11, Fetid Adder’s Tongue, Pulgas Ridge Open Space Preserve (San Carlos)
  • Feb 26, Summit Loop Trail, San Bruno Mountain State and County Park   
  • Mar 5  Uvas Canyon County Park (Morgan Hill) CANCELED
  • Mar 5  Stile Ranch Trail, San Jose
  • Mar 11 Lichen Walk at Pedro Point Headlands (Pacifica) CANCELED
  • Mar 19 Beginner’s Bird and Plant ID Walk at Lake Cunningham Park (San Jose)
  • Mar 19  Mount Madonna County Park (Gilroy)
  • Mar 19  Exploratory Walk on San Bruno Mountain (South San Francisco)
  • Mar 25 Pinnacles National Park (San Benito County)
  • Mar 31 Sun April 2  Spring Wildflowers at Blue Oak Ranch Reserve (Mt. Hamilton)
  • April 9 Red Hills Area - BLM (Chinese Camp)
  • Apr 16 Serpentine Loop Trail in Calero County Park (San Jose)
  • Apr 23  Spring Butterflies on Coyote Ridge (San Jose)
  • April 30 Vernal Pool Tour at Don Edwards SF National Wildlife Refuge, East Bay.
  • Apr 30  9am - 5pm  Henry Coe State Park Backcountry Walk (Morgan Hill)
  • May 6  Grass Walk at Edgewood Park (Redwood City)
  • May 7 - 13 Joshua Tree Camping
  • May 21 Bean Hollow State Beach (Hwy 1)
  • June 10, 2017 Search for Soap - Evening Hike, Pulgas Ridge Open Space Preserve (RWC)
  • July 1 to Tuesday, July 4 Ebbetts Pass, Alpine Lake and Calaveras Big Trees State Park
  • Sep 24 Beginner’s Bird and Plant Identification Walk at Lake Cunningham Park (San Jose)
  • Oct 15 Salt Marsh Bird and Plant Walk at Eden Landing Ecological Reserve, Union City
  • Oct 29 Woody Plants of St. Joseph’s Hill Open Space Preserve (Los Gatos)
  • Nov 19 Trees and Shrubs of SCV, Rancho Cañada del Oro OSP, Morgan Hill
  • Dec 16 Beginner’s Bird and Plant ID Walk, Lake Cunningham Park, San Jose
  • Dec 31 Butano State Park, Pescadero, San Mateo County (with Costanoa NYE Extravaganza Celebration)

2016 field trips

bighorn sheep anza borrego Joerg LohsePhoto by Joerg Lohse

  • Jan 1, Año Nuevo State Preserve (Hwy 1 coast-southern San Mateo County)
  • Jan 10 Know Your Willows:  Guadalupe River Mitigation Area
  • Feb 6 Dirca - Stevens Creek County Park, Cupertino
  • Feb 21 San Pedro Valley County Park (Pacifica)
  • Feb  27 Coal Mine Ridge (Portola Valley)
  • Mar 6 San Bruno Mountain Watch Hike (South San Francisco)
  • Mar 6 – 13 Anza Borrego Desert State Park ( San Diego County)
  • Mar 13 Coyote Lake-Harvey Bear Ranch County Park (Gilroy)
  • Mar 20, Beginner’s Bird and Plant Identification Walk, Lake Cunningham Park (San Jose)
  • Mar 20, San Bruno Mountain (Brisbane)
  • Mar 24, Walk, Talk and Shop Hike at Hidden Villa (Los Altos Hills)
  • Mar 26, Mt. Tamalpais, North Side Loop Hike
  • March 27, Coyote Ridge  (South San Jose)
  • March 29, Presidio Native Plant Nursery Field Trip Tour
  • April 2 Vernal Pools at Jepson Prairie (Solano County)
  • April 3 North Table Mountain Reserve (Butte County)
  • April 10 Rancho San Vicente (South San Jose) CANCELLED DUE TO RAIN
  • April 9 – 14 Eastern Mojave Desert
  • April 16, Calero County Park, Serpentine Loop Trail
  • April 17 Restoration project walk along Stevens Creek, Cupertino
  • May 14 Mount Hamilton Road Trip (San Jose)
  • May 14 Grass Walk at Los Trancos OSP
  • May 15 Butano State Park, Pescadero (San Mateo County)
  • May 22 Geology and Plant Walk at Alum Rock Park (San Jose)
  • May 21 Windy Hill Open Space Preserve (Portola Valley)
  • June 12 First Day of Summer Beginner’s Bird and Plant Identification Walk @ Lake Cunningham Park
  • July 16 - 23 Ericaecious Heaven - Duck Lake and Mt. Eddy Backpacking Trip
  • Oct 30, Uvas Canyon County Park, Morgan Hill
  • Dec 18, Beginners Bird and Plant ID Walk at Lake Cunningham Park (San Jose).

2015 field trips

lewisia-rediviva-bitterroot400 Photo by Dee Himes

  • Jan 1 Año Nuevo State Park (Hwy 1 coast-southern San Mateo County)
  • Feb 7 Eaton Park (San Carlos)
  • Feb 22 Montara Mt., San Pedro Valley County Park (Pacifica)
  • March 1 Pulgas Ridge Open Space (San Carlos)
  • March 5  Maguire Peaks Loop, Sunol Regional Park
  • March 8 Stile Ranch, San Jose
  • March 15 San Bruno Mountain (Brisbane)
  • March 21 Tilden Regional Park, Berkeley Hills
  • March 22 - 28 Central California Camping Trip
  • March 23 –  28 Mojave Desert Car Camp
  • March 28 Coyote Lake (Gilroy)
  • April 5 Edgewood Park, San Carlos
  • April 11 Alum Rock Park (East San Jose)
  • April 12 Calero County Park / Rancho San Vicente (south San Jose)
  • April 26, 9:30am - 2:00pm Sunol Regional Park, East Bay
  • April 26th 10AM-3PM Bonny Doon Ecological Reserve
  • May 2 Mount Hamilton Road Trip (San Jose) 10am - 4pm
  • May 9 Grass Walk at Edgewood County Park and Natural Preserve (Redwood City)
  • May 10 Stile Ranch Hike #2, San Jose
  • May 17 Butano State Park (Pescadero in San Mateo County)
  • May 22 - 25 Sierra Foothills Memorial Weekend Trip
  • Jun 6 - Fountain Thistle Work Party (San Mateo)
  • July 7 - 15 Botanizing the Western and Eastern Siskiyous
  • Aug 8  Stile Ranch Trail, Hike #3
  • Aug 22 Monte Bello Open Space Preserve, Moonlight Walk
  • Nov 21 Bryophytes in Pescadero County Park (San Mateo County)

2014 field trips

Photo by Toni CorelliCoastal flowers overlooking tidepools and Pacific Ocean beyond

  • Jan 1 Año Nuevo State Park (southern San Mateo County)
  • Jan 25 Rancho Cañada del Oro (South San Jose)
  • Feb 8 Eaton Park (San Carlos)
  • Feb 16 Pulgas Ridge (San Carlos)  
  • Mar 16 San Bruno Mountain (Brisbane)
  • Mar 22 New Hagen Meadow (San Jose)
  • Mar 23  Sweeney Ridge (San Bruno)
  • Apr 4 - 6  Carrizo Plain National Monument Car Camp (San Luis Obispo County)
  • Apr 13 Sign Hill (South San Francisco)
  • April 19-20  Mt. Diablo State Park Carcamp and Day Hikes (Contra Costa County)
  • Apr 20 Coyote Lake (Gilroy)
  • May 4 Coyote Lake Harvey Bear Ranch County Park (Gilroy)
  • May 6 Año Nuevo-Cascade Field (San Mateo County Coast)
  • May 11 Bean Hollow Pigeon Point Light Station (San Mateo Coast)
  • May 17 Devil’s Slide Trail (San Mateo Coast)
  • May 18 San Bruno Mountain (Brisbane)
  • May 20 Pescadero (San Mateo Coast)
  • May 27 Montara and McNee Ranch
  • May 31 Fountain Thistle Work Party (San Mateo)
  • June 27-29 Mt. Eddy Carcamp (Klamath Mtns)
  • July 13th–17th  Mt. Lassen Carcamp
  • Jul 26 Crystal Springs Watershed (Mid-peninsula)
  • Aug 23 Bean Hollow SB (San Mateo County Coast)
  • Sat Oct 25 Castle Rock Fall Hike (Skyline – Santa Cruz Mountains)

2013 field trips

  • Jan 1 Año Nuevo State Park (southern San Mateo County)
  • Jan 26 UCSC Upper Campus, Santa Cruz
  • Feb 2 Water Dog Lake (Belmont)
  • Feb 10 Perennials and Woody Plants of Alum Rock Park (San Jose)
  • Feb 23 San Pedro Valley County Park (Pacifica)
  • Mar 2 Edgewoood County Park (Redwood City)
  • Mar 3 San Bruno Mountain (Brisbane)
  • Mar 20 Pinnacles National Park (San Benito County)  
  • Mar 23 Bonny Doon Ecological Reserve (Santa Cruz County)
  • April 6th Coyote Lake (Gilroy) 10am - 3:30pm   
  • Apr 8th– 10th  Lake County, Bear Valley, Palisades, Table Rock
  • Apr 13 Rockaway Headlands (Pacifica), Moss Beach and Pillar Point Bluff (San Mateo Coast)
  • Apr 14 New Hagen Meadow (San Jose)
  • May 5 Grant Ranch (San Jose)
  • May 11 Grass Walk at Edgewood County Park (Redwood City)
  • May 12 Mount Hamilton Road Trip  (San Jose)
  • May 18 Cowell Ranch Beach and Cowell-Purisima Trail (San Mateo Coast)
  • May 19 Stile Ranch/Santa Teresa County Park (San Jose)
  • May 25 Butano Ridge (east of Pescadero)
  • June 8th  Purisima Creek Redwoods Open Space Preserve  (east of Half Moon Bay)
  • June 15 Mt. Diablo State Park (Contra Costa County)
  • Sep 15 Sharsmith Herbarium (San Jose State University)
  • Sep 29 Monte Bello Open Space Preserve (Skyline-west of Palo Alto)
  • Nov 2 Crystal Springs Watershed

2012 field trips

  • Sun Jan 1 Año Nuevo State Park (southern San Mateo County)
  • Sun Jan 22 Sierra Azul (Los Gatos)
  • Sat Jan 28 Quail Hollow Ranch (Santa Cruz)
  • Sat Feb 4 San Pedro Valley County Park (Pacifica)
  • Sat Feb 18 Edgewood County Park and Natural Preserve (Redwood City)
  • Sun Feb 19 Sierra Azul (Los Gatos)
  • Sat Feb 25 Stevens Creek County Park (Los Gatos)
  • Sat Mar 10 Stile Ranch (Santa Teresa County Park)
  • Sun Mar 18 San Bruno Mountain County Park (Brisbane)
  • Sat Mar 31 Uvas Canyon County Park (Morgan Hill)
  • Sun Apr 8 Blair Ranch (Morgan Hill)
  • Sat Apr 14 New Hagen Meadow (San Jose)
  • Wed April 18 Picchetti Ranch Open Space Preserve (Cupertino) 
  • Sat – Tues May 5-8 Carrizo Plain to Cuyama Valley (San Luis Obispo County)
  • Sun May 6 Coyote Lake (Gilroy)
  • Sun May 13 The Wildflowers of Cascade Field (North of Año Nuevo–Hwy 1)
  • Sat May 19 Big Basin Redwoods State Park
  • Sun May 20 Palassou Ridge OSP (Gilroy)
  • Sat Jun 2 Grass Walk at Los Trancos OSP (Los Altos)
  • Sat Jun 9 Fountain Thistle Work Party (San Mateo)
  • Sat Jun 16 Stile Ranch (San Jose)
  • Wed -Thu Jun 27 - Jul 5  Mineral King Backpack (Southern Sierra Nevada) 
  • Sat Jul 21 Crystal Springs Watershed (Mid-peninsula)
  • Sun Aug 5  Bean Hollow State Beach (Hwy 1)
  • Sun Oct 21 Uvas Canyon County Park (Morgan Hill)

2011 field trips

  • Sat Jan 1 Año Nuevo State Park (southern San Mateo County coast)
  • Sat Jan 15 San Francisco Peninsula Watershed Dirca Hike
  • Sat Jan 29 San Bruno Mountain (Brisbane)
  • Sat Feb 5 Edgewood County Park & Preserve (Redwood City)
  • Sat Feb 12 Coal Mine Ridge (Portola Valley)
  • Sat Mar 5 Hidden Villa (Los Altos)
  • Sun Mar 6 Sunol Regional Park (Fremont)
  • Sat Mar 12 Pulgas Ridge Open Space (Redwood City)
  • Sun Mar 13 Stile Ranch (Santa Teresa County Park)
  • Sun Mar 20 – Sun Mar 27 Death Valley Car Camp
  • Sun Mar 27 Coyote Ridge (San Jose)
  • Sat Apr 2 Coyote Ridge (San Jose)
  • Sun Apr 3 Coyote Lake (Gilroy)
  • Sat Apr 9 Joseph Grant Park (San Jose)
  • Sun Apr 10 San Bruno Mountain (Brisbane)
  • Sat Apr 16 10am San Bruno Mountain (Brisbane)
  • Sat Apr 30 South Valley Reserve (eastern Santa Clara County)
  • Sun May 1 Whitehouse Creek (Pescadero)
  • Sat May 7 Blue Oak Ranch Reserve (Mt Hamilton Range)   
  • Sun May 8 Henry Cowell Redwoods State Park  (Felton)  
  • Sun May 15 Grass Walk at Edgewood County Park (Redwood City)  
  • Sun May 22 The Cedars (Sonoma County)
  • Sun May 22 Mt. Madonna County Park (Gilroy)
  • Sun Jun 5 San Bruno Mountain (Brisbane)
  • Sun Jun 19 Beginner’s Woody Plant Walk - Alum Rock Park (San Jose)
  • Sat  Jul 9 Crystal Springs Watershed (mid-peninsula)
  • Fri-Sun July 29-31 Carson Pass (Sierra)
  • Sun Aug 7 Calero Creek (South San Jose)
  • Sat Sept 10 Sun Bean Hollow State Beach (Hwy 1)
  • Sat Oct 8 Hidden Villa (Los Altos)
  • Sat Oct 29 Castle Rock Fall Hike (Skyline-Santa Cruz Mtns) 
  • Sat Oct 29 Fountain Thistle Work Party (San Mateo)
  • Sun Nov 6 Rancho Cañada del Oro (San Jose)

2010 field trips

  • Sat Jan 9 Ano Nuevo State Park
  • Sat Jan 16 Picchetti Ranch and Stevens Creek County Park
  • Sun Jan 31 Stanford Trees and Landscape History
  • Sat Feb 20 San Pedro Valley County Park
  • Sun Feb 21 Los Gatos Canyon: Plant ID-ing for Beginners
  • Sun Mar 7 Rise of the Sporophytes!
  • Sun Mar 14 San Bruno Mountain
  • Sat-Mon Mar 27-29 Golden Valley and Grass Valley Wilderness
  • Sat Apr 3 Coyote Lake-Harvey Bear Ranch
  • Sun Apr 4 Warm Springs Vernal Pools
  • Sat Apr 10 Coyote Ridge
  • Sun Apr 11 San Mateo Coast (Rain Cancelled)
  • Sat Apr 17 Rancho Cañada del Oro
  • Thu Apr 29 Picchetti Ranch Open Space Preserve and Stevens Creek County Park
  • Sun May 2 Blue Oak Ranch
  • Wed May 5 An Evening with the Grasses
  • Sat May 22 Fountain Thistle-San Francisco Peninsula Watershed
  • Sat-Sun May 22-23 The Cedars (Sonoma County)
  • Mon-Fri May 24-28 High Desert Trip - Southeastern Sierra
  • Sun May 30 Mt Hamilton Field Trip
  • Sat Jun 5 Grass Walk at Los Trancos OSP 
  • Sat Jun 12 Fountain Thistle Field Trip & Restoration Work Party at Crystal Springs
  • Sun Jun 13 Mt Hamilton Field Trip
  • Sun Jun 20 Feelin’ Fruity-Belmont's Water Dog Lake Open Space
  • Sat-Sun July 31-Aug 1 Butterfly Valley-Red Hill
  • Sat Aug 14 Portola Redwoods State Park
  • Sat Sep 11 Edgewood Natural Preserve
  • Sat Sept 25 Rancho Cañada del Oro
  • Sun Oct 3 Shields Grove at U.C. Davis
  • Sun Oct 10 Uvas Canyon-San Jose

2009 field trips

  • Sat Feb 28 Fire-follower Walk at Owl and Buckeye Canyons (San Mateo County) 1-4 pm
  • Saturday, March 7, 9 am, Pulgas Ridge Open Space Preserve
  • Sunday, March 8, 9:30 am, Mt. Tamalpais
  • Saturday, March 14, 10 am, Stile Ranch Hike
  • Sunday-Thursday, March 15-19, Desert Wildflower Trip
  • Friday-Sunday, March 20-22, Carrizo Plain National Monument (eastern San Luis Obispo County)
  • Saturday, March 28, 1 pm, Del Monte Forest, Monterey
  • Sunday, March 29, 1 pm, Coyote Ridge (Second trip on Saturday, April 11, 10 am)
  • Sunday, April 5, 10 am, Grant Ranch County Park
  • Sunday April 5, 10:30am-1:30pm. West Pinnacles w/ Corky Matthews
  • Saturday, April 11, 10 am, Coyote Ridge
  • Saturday April 11. Fire Followers at Big Creek Reserve w/ Dave Nelson
  • Monday April 13 through Friday April 17. CA desert
  • Saturday, April 18, 9:30 am, Woods Trail, Sierra Azul Open Space Preserve
  • Wed April 29 7pm An Evening with the Grasses
  • Saturday-Sunday, May 2-3, The Cedars (Sonoma County)
  • Sat May 16 10am San Mateo Coast
  • Sun May 17 9am Mount Hamilton
  • Fri-Tues May 22-26. California Floristic Province in Oregon
  • Sat May 30 1pm Ring Mountain, Marin County
  • Sun Jun 7 10am Grass Walk at Los Trancos
  • Sun Jun 14 10am San Mateo Coast
  • Sun Sep 20 Bonny Doon Ecological Preserve
  • Sun Oct 4 Purisima Creek Redwoods Preserve
  • Sun Oct 25 Fall Creek Unit of Henry Cowell Redwoods State Park

2008 Field Trips


2007 Field Trips

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