• Tolay Lake view from park entrance

Tolay Lake Regional Park -
Master Plan

Tolay Lake Regional Park Master Plan logo(1)

The Tolay Lake Regional Park Master Plan is complete and was approved and adopted by the Sonoma County Board of Supervisors on October 9, 2018.

The Master Plan provides a spectrum of outdoor recreation and environmental education opportunities and protects sensitive habitats and cultural resources. 

    The Final EIR, Draft EIR and Master Plan can be viewed or downloaded below.


    Notice of Availability of an Environmental Impact Report (PDF: 81 kB)

    Download the full Environmental Impact Report:

    FINAL Environmental Impact Report (PDF: 14.28 MB)
    DRAFT Environmental Impact Report (PDF: 20.5 MB)
    DRAFT Environmental Impact Report Appendix (PDF: 55.4 MB)

    Download the Environmental Impact Report by Section:

    Table of Contents (PDF: 1 MB, accessible)
    Chapters 1-3 (PDF: 61 MB, accessible)
    Chapter 4 (PDF: 16 MB, accessible)
    Chapters 5-8 (PDF: 258 kB, accessible)
    Appendix A (PDF: 27 MB, accessible)
    Appendices B-C (PDF: 10 MB, accessible)
    Appendix D (PDF: 20 MB, accessible)
    Appendices E-G (PDF: 10 MB, accessible)
    Appendix H (PDF: 21.8 MB, accessible)

    Download the full Master Plan and Appendices:

    Final Master Plan (PDF: 70.26 MB, not accessible)
    Master Plan Appendix (PDF: 52 MB, accessible)

    Download the Master Plan and Appendices by Section:

    Cover and Table of Contents (PDF: 1.14 MB, accessible)
    Chapter 1 (PDF: 6.35 MB, accessible)
    Chapter 2 (PDF: 4.35 MB, accessible)
    Chapter 3 (PDF: 1.2 MB, accessible)
    Chapter 4 (PDF: 1.93 MB, accessible)
    Chapter 5 (PDF: 21.7 MB, accessible)
    Chapter 6 (PDF: 12.71 MB, accessible)
    Chapter 7 (PDF: 4.23 MB, accessible)
    Chapter 8 (PDF: 6.47 MB, accessible)
    Chapter 9 (PDF: 7.42 MB, accessible)
    References (PDF: 8.9 MB, accessible)
    Appendices A-C (PDF: 19 MB, accessible)
    Appendices D-H (PDF: 20 MB, accessible)
    Appendices I-L (PDF: 24 MB, accessible)
    Appendix M (PDF: 29 MB, accessible)
    Appendices N-O, Q1, R-S (PDF: 3 MB, accessible)

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    Contact Information

    Karen Davis-Brown, Planner II

    Planning Division

    Regional Parks
    County of Sonoma
    Business Hours
    Monday – Thursday
    7:00 AM – 4:30 PM
    Contact us by Phone

    Sign up for Planning Updates

    Office Location

    Sonoma County Regional Parks
    2300 County Center Drive
    Suite 120A
    Santa Rosa, CA 95403

    Google Maps™ Directions