The Plunge San Diego at Fit Mission Beach

Originally built in 1925, the historic Plunge Pool, was at the time, the largest salt water pool in the world holding 355,000 gallons of water. The 60 foot by 175 foot pool was designed after the Spanish Renaissance-style buildings in Balboa Park built in 1915 and 1916. 

The pool was converted to fresh water in 1940, when it then became the largest indoor heated pool in Southern California. Newly renovated, the aesthetics reflect floor to ceiling windows and a retractable roof, allowing swimmers to enjoy the warm San Diego weather all year long. 

The Plunge is located inside of Fit Mission Beach at Belmont Park, an ocean front family friendly amusement park. Open to the public with panoramic views, the Plunge welcomes swimmers of all ages. 

Fit is San Diego's Premier Athletic Club with locations in Carmel Mountain, East Village of Downtown and Solana Beach. Fit will be opening it's newest location in Little Italy Fall 2019.

Pool Rules and safety guidelines


  • No outside food or drinks including gum is permitted on the deck without prior approval.
  • No head first diving anywhere in the pool, only feet first entries are allowed.
  • Personal belongings must be kept off deck floor. Personal belongings may be kept in day lockers.
  • Inflatable obstacle course must be used safely and responsibly at all times. No standing on top of the slides, cliffs or podium. Feet first sliding and entry only. No swimming or playing under the WiBits. 
  • Children under 16 years of age must pass the swim test in order to access the deep end.
  • The sauna is restricted to only guests over the age of 18. 
  • The VIP Deck is only available for Fit Members or Private Bookings. 
  • Towels are only complimentary for Fit Members. All guests and Plunge Members must bring their own towel, purchase a towel or rent a towel for $2. 
  • Children under 52 inches must either wear a life jacket, pass the swim test or be within arms reach from parent or guardian (16+) at all times in order to enter the pool. 
  • Running, dunking, shoulder riding, jumping into the pool, tube chains, or other horseplay is not permitted at any time.
  • Guests are not permitted  on the bulkhead unless part of an organized group or practice.
  • Guests are not allowed  to stand on or jump off of the pedestal. Guests may sit on pedestal.
  • Children should be  supervised at all times. Children under the age of 10 must be accompanied  by a supervising companion over the age of 16.
  • Smoking/vaping is not  permitted in the facility.
  • Underwater photography  is prohibited without prior approval.
  • Swimwear is required  upon entering the water. Swimwear should be properly fitted and shall not indecently expose parts of the body, be transparent, or display obscene or offensive pictures or slogans. Cut-off jeans,  cargo or khaki shorts, pants or any other non-swimwear may not be worn. 
  • Only aquatic shoes are  permitted in the pool, street shoes are not allowed..
  • Glass containers of any kind are not permitted in the facility.
  • Guests with open wounds or obvious signs of bleeding should not be permitted to enter the water.
  • Swimmers who are sick with diarrhea, or who have been sick in the last two weeks, risk contaminating pool water with bacteria. Guests should not enter the water if they have recently been sick.
  • Swim diapers must be worn by children/other diaper wearing individuals. Regular style diapers will not be permitted in the water.  Diaper changing is NOT permitted poolside and must be done in a restroom.
  • Consuming alcoholic beverages is prohibited without prior approval.
  • Only U.S. Coast Guard approved life jackets are permitted. Always ensure the proper fit of a guest’s life jacket prior to allowing them in the water.
  • Breath holding for extended periods of time will not be permitted.
  • Flotation devices and water toys are not permitted unless provided by the facility.
  • Non-Ambulatory guests must transfer from a wheelchair to the water with assistance on The Plunge’s ADA lifts.
  • The Plunge accepts no  responsibility for any loss or damage of personal items.
  • Lifeguards have complete authority at all times.
  • Rules and safety guidelines are subject to change at any time due to Management discretion. 
  • Guests may be asked to leave without a refund if the above rules are not followed.