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Davis Aquatic Masters

40th Annual Lake Berryessa Swim

Saturday, June 1, 2024

Lake Berryessa Logo

(Download a pdf version of this page here.)

DAM's Annual Lake Berryessa Swim is one of the longest running open water swim events in America. Started in 1981 as a friendly lake swim, this event now attracts over 500 swimmers each year to the shores of Lake Berryessa. In 2024, this swim event will host the 2024 USMS Middle Distance National Championship.

Location: Steele Canyon Campground, Steele Canyon Road, Lake Berryessa, Napa, CA (map)

Course: 1-mile and 2-mile looped courses in a freshwater lake. 1 loop for 1 mile swim, and 2 loops for 2 mile swim. See course maps at bottom of page.

Host: Davis Aquatic Masters. Race Director: Kevin Waterson,; Meet Referee: Kerry Halsted.

Event website


Sanction: The adult races are sanctioned by Pacific Masters Swimming for USMS, Inc. Sanction # 384-W003

Conditions/Safety: Expected water temperature is 68-72 degrees. Course is patrolled by safety craft. Individual escorts are not allowed. All swimmers must wear the provided swim cap and follow all USMS Open Water rules. Mandatory safety briefings will be held at 8:50 am and at 11:00 am at the information kiosk. The Event Safety Plan (pdf) will be posted at the registration desk on race day and is available prior to race day by request from

Start: Deep water, wave starts (see below). Finish: Onshore.

Cutoff times: For 2-mile events, 2 hours after wave start. For 1-mile events, 1 hour after wave start. Safety craft will remove swimmers who fall short of the cutoff times.

Seed Times for Start Waves: Entrants will provide estimated 1650 yd or 1500 meter pool time to be used to seed start waves. Those in Category 2 (wetsuit division) need not include a seed time.

Eligibility: This event is open to USMS registered swimmers or members of an equivalent organization (for foreign swimmers). To register for the event, you must provide proof of current membership. You may register for a USMS One-Day Event Membership (OEVT) during the online entry.

Entries: Online entry is provided by Race Roster software.

Entry Deadline: Online registration closes Wednesday, May 29th at 11:59 PM (Pacific time). NO paper entries and NO race-day entries. NO race-day category swaps (you cannot change from wetsuit to non-wetsuit (or vice-versa) on race day). NO race-day race swaps (you cannot change from the 2-mile to the 1-mile race (or vice versa) on race day). You may always withdraw from a race on race day.

NOTE: To ensure you receive a t-shirt in your desired size, you must enter by May 1, 2024 (see below for t-shirt design). T-shirt purchase is available on registration page.

Entry Fees:

$55.00 1-mile swim

$55.00 2-mile swim

$80.00 Both swims

$1.75 + 6.9% Race Roster Processing Fee

$5.00 Facility Use Fee (includes parking)

Entry fees are non-refundable and non-transferable. Online entry is paid by credit card to "DAVIS AQUATIC MASTERS".

Food and Drink

Due to safety and environmental protocols, we are serving only bottled water, and non-perishable, pre-packaged snacks - such as granola bars. If you want more substantial fare, please bring it with you.

Scoring Divisions: Divided by gender in five-year increments according to USMS Rules (18-24, 25-29, 30-34, etc.).

Awards: Official Lake Berryessa Swim embroidered towels will be given to the top three male and female finishers in each designated USMS age group for the 1 and 2 mile races in Category 1. Awards for the Category 2 races will be presented to the top three male and female overall finishers, regardless of age. Awards for the Middle Distance (2-mile) National Championship race will also include USMS patches for age-group top finishers, and medals for all top 6 finishers in each age group. The top 3 overall, male and female, Category 1 swimmers based on combined 1 and 2 mile times will receive special awards. You must pick up awards at the race. We will not mail awards.

Race Day check-in opens at 7:30 a.m.

Race Day check-in closes at:

9:00 am for USMS, Category 1 and Category 2, 2-mile

11:15 am for USMS, Category 1 and Category 2, 1-mile

Race Day Parking/Facility Use Fee: Race Day Facility Use fees (includes parking) are $5 per entrant. This fee includes day use-pass for the main site, environmental protection fees, and parking on campground sites below and above the race area.

When you get to the race, parking attendants will direct you to the nearest possible parking space. You will not have a reserved parking spot.

Anticipated Race Start Times (Note: number of waves may be adjusted by the race director depending on number of entrants. Final Wave Assignments will be given at Race Check-in on Race Day)

  • 9:20 am - 2-mile Category 1: Fastest 2-mile Wave (based on seed times)
  • 9:25 am - 2-mile Category 1: Second Fastest 2-mile Wave (based on seed times)
  • 9:30 am - 2-mile Category 1: Third Fastest 2-mile Wave (based on seed times)
  • 9:35 am - 2-mile Category 1: Fourth Fastest 2-mile Wave (based on seed times)
  • 9:40 am - 2-mile Category 2: All 2-mile Category 2 Swimmers
  • 11:50 am - 1-mile Category 1: Fastest 1 mile Wave (based on seed times)
  • 11:55 am - 1-mile Category 1: Second Fastest 1-mile Wave (based on seed times)
  • 12:00 pm - 1-mile Category 1: Third Fastest 1-mile Wave (based on seed times)
  • 12:05 pm - 1-mile Category 1: Fourth Fastest 1-mile Wave (based on seed times)
  • 12:10 pm - 1-mile Category 2: All 1-mile Category 2 Swimmers
  • Course Closes at 1:10 PM

Other Event Details:

  • Commemorative 40th Anniversary/Mid-Distance National Championship t-shirts will

    be available for both advance and race day purchase. Limited quantities of

    commemorative t-shirts will be available for purchase at the event.

  • Lodging: Basic campsites (no running water or electricity) are available at Steele Canyon Campground. Call 1-877-386-4383 for reservations. Full hookup camping sites are available at Pleasure Cove Marina (, click on “Forever Resorts Marinas”). Nearest hotels are in Napa, Vacaville, or Fairfield.

Course Maps:

DAM is a 501(c)(3) organization that supports local swimming related organizations and swimmers with donations and scholarships. All proceeds support the DAM mission. DAM is donating a portion of proceeds to the Napa Valley Land Trust. For information about the Napa Valley Land Trust and to donate visit:

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