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Western Tiger Swallowtail Papilio rutulus Papilionidae Swallowtails Flies February to November Host Plant Willow, Cottonwood, Sycamore, Elm Nectar Plant California buckeye, Bull thistle Daniel Fitzgerald Daniel Fitzgerald Underwing

Acmon Blue Icaricia acmon Lycaenidae Blues, Coppers, Hairstreaks Flies All year Host Plant Buckwheat, Legumes Nectar Plant Chamise, Horehound, Coyote bush, Narrow-leaved milkweed Michael Marchiano Early Spring Female Daniel Fitzgerald Male Underwing Daniel Fitzgerald Summer Female

Wildflower Mount Diablo Tall Stephanomeria, Rod Wirelettuce Scientific Name: Stephanomeria virgata ssp. pleurocarpa Family: Asteraceae (Sunflower Family) Blooms: Jul - Sep Color: Blue-Purple Annual herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Ken-ichi Ueda, iNaturalist

The Mount Diablo Observatory Association (MDOA) is dedicated to public education in astronomy. The organization includes scientists, engineers, and other professionals with a common interest in astronomy and a desire to further science education. MAILING ADDRESS: Mt. Diablo Observatory Association, Inc. P.O. Box 3165 Walnut Creek, CA 94598-3165 3 cups Blueberries 3 cups Flour 1½ cups Butter The Mount Diablo Observatory Association (MDOA) is dedicated to public education in astronomy. The organization includes scientists, engineers, and other professionals with a common interest in astronomy and a desire to further science education. MAILING ADDRESS: Mt. Diablo Observatory Association, Inc. P.O. Box 3165 Walnut Creek, CA 94598-3165 In celebration of the International Year of Astronomy 2009, NASA Great Observatories -- Hubble Space Telescope, Spitzer Space Telescope, and Chandra X-ray Observatory -- have produced a matched trio of images of the central region of our Milky Way. Stargazing on Mount Diablo Mount Diablo Astronomical Society (MDAS) Event Calendar The Mount Diablo Observatory Association, Inc. (MDOA) is a cooperating organization within Mount Diablo State Park. Incorporated in 1988, MDOA members planned, raised funds and established an astronomical observatory. The observatory consists of a Solar powered 96 square foot roll-off roof observatory, and a 500 square foot warming room. The heart of the observatory is a computer controlled Celestron 14, which has a variety of electronic attachments, a CCD camera, and photographic equipment. The addition of a refractor to the observatory has enhanced the photographic tasks and the public outreach of the observatory. A 15 Kilowatt generator provides all the electrical needs for lighting, heating, and AC for the comfort of our visitors in the warming room. At nearly 3800 feet above the mean sea level, the observatory has an unobstructed view of the night sky (and Mount Diablo is the highest mountain within the San Francisco Bay Area with a public access observatory). Every year MDOA and its sister organization, Mount Diablo Astronomical Society, operate Public Astronomy Programs under the sponsorship of Mount Diablo State Park. This program is now in its 28th year! For written information, applications for Associate Membership ($30/year; $25 annual membership + $5 MDAS name badge) to support the observatory or for other correspondence feel free to contact us by email, or in writing at: Mount Diablo Astronomical Society P.O. Box 4889 Walnut Creek, CA 94596 Celestron 14 | Jon Wilson Planetary Nebula, M 57 in Lyra. June 12, 2010 Information for Visitors: EXCITEMENT FOR THE WHOLE FAMILY! MOON Photographed April 13, 2009 Participate in hands-on astronomy activities followed by supervised observing through the many different telescopes of MDAS members. Bring snacks, water, binoculars, and warm clothes. If you bring a flashlight please cover it with red material. Please note that only Mount Diablo Astronomy Docents may set up telescopes on Public Nights. LOCATION DETAIL Mount Diablo, at the Lower Summit Parking Lot off Summit Road, almost to the top of Mount Diablo Summit Rd, Walnut Creek, CA 94598 More information at: Mount Diablo Astronomical Society Another astronomy link: Western Amateur Astronomers The material above is provided by Mount Diablo Observatory Association and Mount Diablo Astronomical Society

Wildflower Mount Diablo Van Houtte's Columbine, Stream Columbine Scientific Name: Aquilegia eximia Family: Ranunculaceae (Buttercup Family) Blooms: May-Oct Color: Red-Pink Perennial herb Native, endemic to California Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Daniel Fitzgerald Daniel Fitzgerald

Wildflower Mount Diablo California Lomatium Scientific Name: Lomatium californicum Family: Apiaceae (Parsley-Carrot Family) Blooms: Apr Color: Yellow-Orange Perennial herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Ken-ichi, iNaturalist

list of hikes in Mount Diablo State Park with distance, trailhead and rating Find your Hike If you'd like more information about hiking on Mount Diablo, the Trail Map of Mount Diablo State Park and the Hiker's Guide to Mount Diablo State Park are available at the MDIA Online Store. The trail map is also available at the North Gate and South Gate Entrance Stations, the Summit Visitor Center, and the Mitchell Canyon Visitor Center. Be sure you know how to read trail signs on Mount Diablo . Type of Hike Demanding 4 miles Burma Road Loop Trailhead: Northgate Road, Walnut Creek, pull-out at 3-mile marker Read More Demanding 8 miles Eagle Peak from Mitchell Canyon Trailhead: Mitchell Canyon Read More Demanding 6 miles Grand Loop Trailhead: Lower Summit Parking Lot Read More Demanding 7 miles Mitchell Canyon - Back Creek Loop Trailhead: Mitchell Canyon Read More Demanding 13 miles Mitchell Canyon to Summit (Loop) Trailhead: Mitchell Canyon Read More Demanding 2.5 miles Mount Olympia from Three Springs Trailhead: Marsh Creek Road, Clayton Read More Demanding 8 miles Mount Olympia via Middle Trail Trailhead: Marsh Creek Road, Clayton Read More Demanding 8 miles Oyster Point from Curry Point Trailhead: Oyster Point Trail from Sycamore Canyon Read More Demanding 11 miles Oyster Point via Riggs Canyon Trailhead: Morgan Territory Road heading toward Livermore, about four and-a-half miles from Marsh Creek Road junction Read More Demanding 17 miles Pine Pond - Frog Pond Loop Trailhead: Parking pull-out at Curry Point, South Gate Road Read More Demanding Trail Highlights - Demanding Hikes Read More Demanding 9 miles Wall Point - Pine Canyon Loop (Demanding) Trailhead: Macedo Ranch Staging Area Read More Easy or Short 3 miles Castle Rock Trailhead: End of Castle Rock Road Read More Easy or Short <1 mile Deer Flat Road (at Juniper Camp) Trailhead: End of Juniper Camp loop road Read More Easy or Short 3.8 miles Donner Canyon Trailhead: Mitchell Canyon Read More Easy or Short 1.2 miles Fossil Ridge Trail Trailhead: Uplands Picnic Area, adjacent to South Gate Road Read More Easy or Short 2.4 miles Juniper Trail Trailhead: Laurel Nook Group Picnic Area, in Juniper Campground Read More Easy or Short <1 mile Mary Bowerman Trail (Popular) Trailhead: Lower Summit Parking Lot Read More Easy or Short <1 mile Mary Bowerman Trail (Short Walks) Trailhead: Lower Summit Parking Lot Read More Easy or Short 4 miles Mitchell Canyon Trailhead: Mitchell Canyon Read More Easy or Short 4 miles Mitchell Canyon Nature Trail Trailhead: Mitchell Canyon Read More Easy or Short 1.6 miles Pine Pond Trailhead: Burma Road crossing, Northgate Road Read More Easy or Short <1 mile Sentinel Rock Trailhead: Live Oak Campground (Rock City area) Read More Easy or Short <1 mile Site of Mountain House Trailhead: Junction Picnic Area Read More Easy or Short Trail Highlights - Easy-Short Walks Read More Moderate 4.5 miles Balancing Rock and Knobcone Point Trailhead: Curry Point, South Gate Road Read More Moderate 4.8 miles Black Point Loop Trailhead: Mitchell Canyon Read More Moderate 5.8 miles Chase Pond - Hidden Pond Trailhead: Curry Point, South Gate Road Read More Moderate 3.2 miles Dan Cook Canyon Trailhead: South Gate Road, just beyond the boundary gate Read More Moderate 6.3 miles Eagle Peak Trailhead: End of Juniper Campground loop road Read More Moderate 7.6 miles Falls Trail Loop (Moderate) Trailhead: Mitchell Canyon Read More Moderate 8 miles Falls Trail Loop (Popular) Trailhead: Mitchell Canyon Read More Moderate 4 miles Juniper - Pioneer - Summit Loop Trailhead: Diablo Valley Overlook at Juniper Read More Moderate 3.4 miles Madrone Canyon Loop Trailhead: Curry Point, South Gate Road Read More Moderate 4.6 miles Mount Olympia from North Peak Trailhead: Roadside parking area at Devil’s Elbow, on Summit Road Read More Moderate 5.3 miles Olofson Ridge Trailhead: Mitchell Canyon Read More Moderate 3 miles Sycamore Canyon Loop (Popular) Curry Point, South Gate Road Read More Moderate Trail Highlights - Moderate Hikes Read More Moderate 4 miles Twin Peaks - Mitchell Rock Loop Trailhead: Mitchell Canyon Read More Moderate 6 miles Wall Point - Pine Canyon Loop (Moderate) Trailhead: Macedo Ranch Staging Area Read More Varies 6 miles Trail Through Time Trailhead: South Gate Road or Summit Road Read More

Wildflower Mount Diablo Chaparral Currant Scientific Name: Ribes malvaceum var. malvaceum Family: Grossulariaceae (Gooseberry Family) Blooms: Jan - Mar Color: Red-Pink Shrub Native, endemic to California Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Kevin Hintsa

brochures about trails, wildlife and plants Brochures and Resources MDIA publishes a library of informative brochures that are available for download (PDF). Categories include Trail, Plant, and Wildlife Guides. Filter by Category Select Category Blooming Now List View or Download Plant or Bloom Guide Common Mammal Tracks of Mount Diablo Brochure View or Download Wildlife Guide Eagle Peak - Back Creek Loop View or Download Trail Guide, or Park Information Mary BowermanTrail Interpretive Guide View or Download Trail Guide, or Park Information Mount Diablo Education Center at Mitchell Canyon Brochure View or Download Trail Guide, or Park Information Native Plant Garden Plant Inventory List View or Download Plant or Bloom Guide Peregrines of the Diablo Region Brochure View or Download Wildlife Guide Rare and Endangered Plant Species List View or Download Plant or Bloom Guide Summit via Back Creek and Mitchell Canyon View or Download Trail Guide, or Park Information Trail Through Time (A Geological Journey) View or Download Trail Guide, or Park Information Your Dog in the Park View or Download Trail Guide, or Park Information Common Ferns of Mitchell Canyon Brochure View or Download Plant or Bloom Guide Common Mammals of Mount Diablo Brochure View or Download Wildlife Guide Fall Trail Loop View or Download Trail Guide, or Park Information Mitchell Canyon Trail Interpretive Guide View or Download Trail Guide, or Park Information Mount Diablo State Park Brochure View or Download Trail Guide, or Park Information Native Plant Garden at Mitchell Canyon Map View or Download Plant or Bloom Guide Plants on the Summit and Fire Interpretive Trail List View or Download Plant or Bloom Guide Rock City Map View or Download Trail Guide, or Park Information Tarantulas: Protect These Gentle Giants Brochure View or Download Wildlife Guide View from Mount Diablo Brochure View or Download Trail Guide, or Park Information

Wildflower Mount Diablo Gambel's Milkvetch Toxic Scientific Name: Astragalus gambelianus Family: Fabaceae (Legume Family) Blooms: Mar - Jun Color: Blue-Purple Annual herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Daniel Fitzgerald Daniel Fitzgerald Leaf detail Daniel Fitzgerald Full plant view

Callippe Fritillary Speyeria callippe Nymphalidae Brushfoots Flies April to July Host Plant Violet, Johnny Jump-up Nectar Plant California buckeye, Coyote mint Daniel Fitzgerald Daniel Fitzgerald Underwing

California Sister Adelpha californica Nymphalidae Brushfoots Flies March to November Host Plant Oak Nectar Plant California buckeye Michael Marchiano Underwing Daniel Fitzgerald