UPDATED May 17, 2024


Visitor Center Hour Changes

Starting the week of May 20 and going through the summer, the Visitor Center at the Sacramento NWR will be open Thursdays and Fridays from 9am-4pm (subject to change, closed on Federal holidays). The bathrooms outside the Visitor Center, the Auto Tour, and the Wetland Walk Trails continue to be open 7 days a week, 1 hour before sunrise to 1 hour after sunset at the refuge.

Intermittent Closure of River Units starting Monday April 29, 2024

  • There will be intermittent closures of various units on the Sacramento River NWR starting 4/29 for follow-up fuel reduction work. Crews will be starting at the Packer Unit and moving north through the River Refuge. Expect a sign at the gate if a unit is closed. Thank you for your patience, understanding and flexibility while we get this important work done!

Request for Scoping Comments for the Draft Environmental Assessment for the Sacramento National Wildlife Refuge Complex, San Luis National Wildlife Refuge Complex, and Stone Lakes National Wildlife Refuge for Management of Aquatic Invasive Plants

  • The U.S. Fish and Wildlife Service (Service) is preparing a Draft Environmental Assessment (EA) to evaluate the potential physical, environmental, cultural, and socioeconomic effects associated with the management of aquatic invasive plants within and surrounding the Butte Sink Wildlife Management Area (WMA), Colusa National Wildlife Refuge (NWR), Delevan NWR, Sacramento NWR, Sacramento River NWR, Steve Thompson North Central Valley WMA, Sutter NWR, San Joaquin River NWR, San Luis NWR, Merced NWR, Grasslands WMA, and Stone Lakes NWR (hereto referred to as the “Covered Refuges”).
  • View or download the full scoping letter here.
  • The Service respectfully requests that you consider the proposed action and provide any comments and/or available information that you may have regarding resources within and adjacent to the Covered Refuges. At this time, we are seeking input to help identify the scope of issues and potential alternatives to be analyzed in the Draft EA, as well as regulatory concerns and any other relevant information. Please provide any comments in writing via email by 5:00 P.M. on May 25, 2024 to fw8plancomments@fws.gov. Before including your address, phone number, email address, or other personal identifying information in your comment, please be aware that your entire comment, including your personal identifying information, may be made publicly available at any time. While you can ask us in your comment to withhold your personal identifying information from public review, we cannot guarantee that we will be able to do so.
Colusa National Wildlife Refuge is part of the SACRAMENTO NWR COMPLEX. Colusa NWR offers many visitor activities: drive the auto tour, take photos, watch wildlife, go for a hike, or take part in a waterfowl hunt.
Wildlife viewing from the Observation Platform at Colusa National Wildlife Refuge
Learn about Birdwatching, Photography, Hiking, Biking, Hunting and Education at Sacramento NWR Complex

Visit Us

Colusa National Wildlife Refuge is just one of the 5 National Wildlife Refuges and 3 Wildlife Management Areas that make up the Sacramento National Wildlife Refuge Complex. Colusa NWR offers a wide variety of recreational activities for visitors: a 3-mile driving tour, 1-mile walking trail, hunting, photography and more! 

Find out more about Colusa NWR by exploring the menu to the left (desktop) or hamburger menu top-right (handheld device), or see our Plan Your Visit page (link below) to find everything the Complex has to offer.

PLAN YOUR VISIT <-- Click here to find all the information you need to visit the Complex.....

           • ACTIVITIES
            • visitor center
            • auto tours
            • trails
            • photography
            • bicycling
            • hunting
            • environmental education
      • HOURS

VISITOR QUICK-LINKS for Sacramento NWR Complex


Maps with

Trail Maps/

& Surveys


PLAN YOUR VISIt to the complex
(Complex includes
all refuges, below) 
(see specific
refuges, below)
-TRAILS page
-River NWR MAPS page
-Wildlife Checklist
-Waterfowl Surveys
Sacramento NWRDirections - Sac NWR-Visitor Maps -Sac NWR
-Wetlands Walk guide
-Wildlife Checklist
-Waterfowl Surveys
Hunt Map - Sac NWR
Delevan NWRDirections - Del NWR--Wildlife Checklist
-Waterfowl Surveys
Hunt Map - Del NWR
Colusa NWRDirections - Cls NWRVisitor Map - Cls NWR-Wildlife Checklist
-Waterfowl Surveys
Hunt Map - Cls NWR
Sutter NWRDirections - Sut NWRVisitor Map - Sut NWR-Wildlife Checklist
-Waterfowl Surveys
Hunt Map - Sut NWR
Sacramento River NWRRiv NWR MAPS pageRiv NWR MAPS page-Wildlife ChecklistRiv NWR MAPS page
Llano Seco Unit (STNCV WMA)Directions - Llano SecoVisitor Map - Llano Seco-Wildlife Checklist
-Waterfowl Surveys
Butte Sink WMA---Waterfowl Surveys-
Willow Creek/Lurline WMA----

Location and Contact Information

      About Us

      Colusa National Wildlife Refuge is part of the Sacramento National Wildlife Refuge Complex. It is located about 70 miles north of the metropolitan area of Sacramento and one mile southwest of the town of Colusa in Colusa County. The refuge consists of 5,077 acres consisting primarily of wetlands, with some grasslands and riparian riparian
      Definition of riparian habitat or riparian areas.

      Learn more about riparian

      Click on the link below to learn more about us!

      What We Do


      • Resource Management

      To help plants and wildlife, Refuge staff uses a variety of habitat management techniques to maintain, recover or enhance plant and wildlife values. Refuge staff carefully consider any management techniques and employ them in varying degrees according to the situation.

      • Conservation and Partnerships

      The Complex is involved in many conservation endeavors, including Comprehensive Conservation Plans, Private Landowner Programs, and the National Wildlife Refuge System Improvement Act.

      Click on the link below to learn more about what we do!

      Our Organization

      National Wildlife Refuge System Improvement Act of 1997:The NWRS Improvement Act defines a unifying mission for all refuges, including a process for determining compatible uses on refuges, and requiring that each refuge be managed according to a CCP. The NWRS Improvement  Act expressly states that wildlife conservation is the priority of System lands and that the Secretary shall ensure that the biological integrity, diversity, and environmental health of refuge lands are maintained. Each refuge must be managed to fulfill the specific purposes for which the refuge was established and the System mission. The first priority of each refuge is to conserve, manage, and if needed, restore fish and wildlife populations and habitats according to its purpose.

      A bright blue sky obstructed by fluffy white clouds reflected off of a stream shot from inside a kayak
      The U.S. Fish and Wildlife Service manages an unparalleled network of public lands and waters called the National Wildlife Refuge System. With more than 570 refuges spanning the country, this system protects iconic species and provides some of the best wildlife viewing opportunities on Earth.

      Our Species

      Colusa NWR regularly supports peak wintering populations of over 150,000 ducks and  60,000 geese. Thousands of waterfowl are present from September through March. Peak populations occur in December and January. Many birds including nesting wood ducks and mammals can be seen year-round.

      Species and Habitats  <-- Click here to learn more about our species and habitats!

      Wildlife Checklist  <-- Click here to view our Wildlife Checklist