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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. The 39th Annual DAM Lake Berryessa Open Water Swim will be held on Saturday, June 3, 2023!

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Current Lake Temperature: 70.5 Degrees and Climbing!

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: Matt Zachan,

Meet Referee: Kerry Halsted

Sanction: The adult races are sanctioned by Pacific Masters Swimming for USMS, Inc.,  Sanction #383-W002

Conditions/Safety: Expected water temperature is 65-70 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 will be posted at the registration desk on race day and may be viewed here.

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.

Entry Deadline: Online registration closes Wednesday, May 31 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 cannotchange 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, 2023 (see below for t-shirt design). T-shirt purchase is available on registration page.

Entry Fees:
$50.00 1-mile swim
$50.00 2-mile swim
$75.00 Both swims
$5.00 Club Assistant Processing Fee

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

Food and Drink:
Due to COVID Safety 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: Towels are back!!! 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 . 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

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: Race Day Parking fees are $15 per vehicle with up to 4 occupants, and $10 per vehicle with up to 2 occupants. Vehicles with more than 4 occupants will be charged an additional $5 for each additional occupant. We strongly encourage entrants to carpool. Entrants must purchase parking passes prior to coming to the race site and must bring a printed copy of the parking pass to the race. You will receive an email with instructions on how to purchase your parking passes in the days leading up to the race. Please do not forget your parking pass!! 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.

Follow the steps below to purchase your pass:

  1. Click this link: 2023 Lake Berryessa Swim Parking Pass

  2. Select dates: Saturday, June 3rd - Sunday, June 4th

  3. Select the amount of people

  4. Click search

  5. Scroll down to the applicable site-type and select either 1-2 passengers or 3-4 passengers depending on how many passengers you will have in your vehicle 

  6. Click On Site Location

  7. Select an available site (from the dropdown) to continue with booking

  8. Checkout

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 t-shirts will be available for both advance and race day purchase. The
shirts are cotton and will be available in two colors, Black or Dark Green, and in Unisex
sizes S-XXXL. A sizing chart is available here. 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 Camp Sites. Nearest hotels are in Napa, Vacaville, or Fairfield.

Course Maps: