List of Events

Below is a quick-reference guide to events currently offered, listed by organization. Details and further information for all events listed can be found in our Calendar. Websites for each organization listed are given for your convenience.

California Botanical Society

California Botanical Society (CBS) offers monthly academic botany talks through their botany speaker series, and sponsors a Graduate Student Symposium every other year. Their website is at https://calbotsoc.org/

  • May 8, 2025. Presentation. 50 Peaks Project – documenting alpine plant diversity and distribution in Washington’s Cascade Range (and beyond)

California Invasive Plant Council

California Invasive Plant Council (Cal-IPC) offers training sessions when their budget allows. Symposia continue to be offered yearly. Visit Cal-IPC at https://www.cal-ipc.org/.

  • November 12 to 15, 2025. Symposium. Beyond Eradication: Resistance, Resilience, and Recovery.

California Native Grasslands Association

The California Native Grasslands Association (CNGA) offers various events throughout the year. For details and registration information, please go to cnga.org.

    California Native Plant Society

    CNPS offers periodic workshops and professional training courses. Discounted registration fees are available to CNPS members. See https://www.cnps.org/education/workshops for full descriptions and registration information.

    • All current workshops are full. See website for further details.

    Friends of the Ahart Herbarium

    Friends of the Ahart Herbarium (formerly Friends of the Chico State Herbarium) offers workshops and presentations throughout the year. Their events calendar is at http://friendsoftheahartherbarium.org/

    • May 15, 2025. Presentation. Altered fire regimes threaten rare cypress species in northern California.
    • May 31 to June 1, 2025. Workshop. California oak pests and diseases.

    Friends of the Jepson Herbarium

    Friends of the Jepson Herbarium offers weekend workshops, most of which will be in person, and mini-workshops, all of which are virtual. All require pre-registration and fees. (Wait-listed workshops are not included in the following list.) Details can be found at ucjeps.berkeley.edu/workshops/

    • May 16 to 18, 2025. Workshop. Lichens of Mendocino.
    • June 7 to 8, 2025. Workshop. Basic botany and an introduction to California plant families.
    • June 25 to 27, 2025. Workshop. Celebrating 75 years of the Jepson Herbarium!
    • June 27 to 29, 2025. Workshop. Celebrating 75 years of the Jepson Herbarium!
    • July 7 to 9, 2025. Workshop. Celebrating 75 years of the Jepson Herbarium!
    • July 9 to 11, 2025. Workshop. Celebrating 75 years of the Jepson Herbarium!
    • August 23, 2025. Virtual workshop. Where does food come from?
    • November 14 to 16, 2025. Workshop. Mushrooms and mycorrhizae of Mendocino.

    Horsetown-Clear Creek Preserve

    Horsetown-Clear Creek Preserve (HCCP) sponsors a series of outdoor events each spring and fall. Events typically start at the HCCP parking area on Clear Creek Road, about 7 miles west of Highway 273, just west of the Clear Creek bridge, and are free. Please see horsetownclearcreekpreserve.org for further information.

    • May 17, 2025. Field trip. Let’s hear it for the vulture.
    • May 18, 2025. Field trip. Gold Rush history walk.
    • May 31, 2025. Field trip. Wading into the water: the hidden world of aquatic insects.
    • June 1, 2025. Field trip. Practicing curiosity through nature journaling.

    Mount Lassen Chapter CNPS

    Mt. Lassen Chapter CNPS, based out of Chico, offers many fun field trips and presentations throughout the year. Their website is https://mountlassen.cnps.org/

    • May 10, 2025. Field trip. Big Bald Rock.

    North Coast Chapter CNPS

    North Coast Chapter CNPS, headquartered in Arcata, is a busy chapter that sponsors plant sales, wildflower shows, walks, talks, field trips, and camping and backpacking adventures. Their website is https://northcoastcnps.org/

    • Every first Saturday of the month. Garden tour. Native plant garden tour.
    • May 14, 2025. Presentation. Adventures in native plant gardening.
    • May 16 to 18, 2025. Overnight field trip. Smith R weekend trip.
    • May 30 to June 2. Workshop. Bryophyte foray.
    • June 14, 2025. Field trip. Damnation Creek day hike.
    • June 17, 2025. Class. Plant identification session.

    Shasta Birding Society

    Wintu Audubon Society offers birding excursions and presentations all year long. Their website is at https://www.wintuaudubon.org/

    • Every second Saturday of the month. Birding field trip. Turtle Bay second Saturday bird walk.
    • May 11, 2025. Birding field trip. Raptors and birds of Butte Valley.
    • May 17, 2025. Birding field trip. Shasta Birding Society’s big day at the falls: swifts and swallows tour.

    Shasta Chapter CNPS

    Shasta Chapter CNPS sponsors a diverse array of activities and events throughout the year, all of which will be posted on this blog site. Please see our website at https://chapters.cnps.org/shasta/ for more information about our chapter.

    • May 10, 2025. Field trip. Hirz Bay Trail field trip.
    • May 11, 2025. Wildflower show. 32nd Annual Siskiyou County Mother’s Day Wildflower Show.
    • May 15, 2025. Presentation. A keystone species: beavers and their effect on native plant communities.
    • May 18, 2025. Field trip. McCloud River Falls field trip.
    • May 24, 2025. Work day. Sulphur Creek cleanup.

    Shasta Environmental Alliance

    Shasta Environmental Alliance (SEA) has many diverse events and activities running throughout the year. See their website at https://www.ecoshasta.org/.

      Shasta Land Trust

      Shasta Land Trust’s Wildways series of fundraising events begin in April and run through the rest of the year. All events require fees and reservations. For further information, visit their site at https://www.shastalandtrust.org/.

      • June 5, 2025. Field trip. A tale of two rivers hike.

      Siskiyou Field Institute

      Siskiyou Field Institute (SFI), based out of Deer Creek Center in Selma, Oregon, offers many classes and field courses on a diverse set of topics throughout the year. All classes require reservations and fees. SFI’s website is at https://siskiyoufieldinstitute.org/.

      • June 8, 2025. Field course. Early summer mushrooms of the Cascades.
      • June 15, 2025. Field course. Serpentine botany.
      • June 17 to 19, 2025. Field course. Butterflies & moths of the Cascade-Siskiyous.

      The Nature Conservancy

      The Nature Conservancy (TNC) sponsors occasional field trips throughout the year. Contact information varies with event, and is provided with every listing.

        Turtle Bay Exploration Park

        Turtle Bay’s McConnell Arboretum & Botanical Gardens Nursery offers occasional presentations, weekly walks through their botanical garden, and an annual plant sale. Turtle Bay Exploration Park website is at https://www.turtlebay.org/

        • Monthly, on the last Saturday of the month. Garden tour. Guided garden walks with the horticulture manager.
        • May 10, 2025. Workshop. Succulent dish planting workshop.
        • May 24, 2025. Presentation. Successful garden irrigation.
        • June 14, 2025. Presentation. Successful indoor gardening with affordable grow lights.

        US Forest Service

        The US Forest Service provides presentations, field trips, and volunteer opportunities throughout the year. Contact information varies with sponsoring forest; details are provided for each event listed.

        • May 11, 2025. Wildflower show. 32nd Annual Siskiyou County Mother’s Day Wildflower Show.

        & More!

        Here are the now-and-then events that don’t fit in any of the above categories, but are nonetheless worthwhile and of great interest to California’s native plant lovers!

        • July 26 to 30, 2025. Conference. Botany 2025: Botany without Barriers.