Charles River Aquatics
100 X 100s Memorial Marathon Swim 

Blodgett Pool  
Harvard University
65 North Harvard St. Boston, MA


Sponsored by  


This is a fun, team-building event with swimmers and triathletes from around New England and the nation.  Join us in bringing in the New Year and raising money for the Marly Pineda Memorial Scholarship Fund set up at Marly's alma mater, Smith College, in honor and memory of our friend and coach who we lost in 2010. Registration is $50/swimmer with a portion of the event proceeds going directly to the Smith College Scholarship Fund.


~All participants should be able to swim a 2:20 base interval or faster to finish 100x100 by the mandatory cutoff time.
~Space is limited. 
~Registration has closed. Please contact [email protected] if you would like try and register late.
~Online Registration only. NO RACE DAY REGISTRATION
~This event is open to the public- please invite your swimmer and triathlete friends
~Participants must be 18 years old to participate
~There are no refunds if you cannot attend

Sunday, January 12th, 2020, Blodgett Pool, Harvard University.

  • 8:00 AM: Doors open
  • 8:00-8:45 AM: Warm-up and lane organization.  Use the Restrooms before you start.
  • 8:45 AM: All swimmers must be at their lane or in the water at their lane.
  • 8:50 AM: Mandatory Pre-Race Briefing & singing of the National Anthem, performed by CRA Head Coach Scott Mc Inerney.  All lanes should be organized at this time.  
  • 9:00 All lanes begin 100x100: We will have the new scoreboard to count the 100s for each interval. We will use the digital wall-clocks to follow intervals and track total time.
  • 1:00 PM: All swimmers must be out of the pool.


TIPS FOR THE 100x100:

  • BE AT YOUR LANE BY 8:45 AM (so we can organize lanes)
  • RESTROOM BREAKS:  Use the restrooms before you start as there will be no scheduled breaks during the 100x100. If you would like to make up the 100's you missed during restroom breaks there will be time for that at the end, however, all swimmers must exit the pool by 1:00 PM. 
  • BRING EXTRA GOGGLES in case yours break.  We will provide free swim caps for participants.
  • EQUIPMENT: FINS are encouraged for those who are prone to shoulder injuries.  NO PADDLES: paddles are not allowed at this event because we have had issues with swimmers getting injured when hit by paddles.
  • HYDRATE CONTINUOUSLY. Please bring SPORTS DRINKS, WATER, GELS, GUs, AND SNACKS. Bring plastic bottles - NO GLASS ON DECK - that have easy-to-use squeeze tops, as you may not have time to unscrew conventional tops in between 100's. Mark your bottles with a recognizable feature, as many swimmers will be drinking the same brand and flavor of sports drink in the same lane. 
  • EAT BREAKFAST: Before you arrive, even if it is a small breakfast. Eat before the event and eat a meal soon after the event.  Fueling before, during and after will maximize your performance and your ability to recover. Bring easy-to-consume snacks such as Gels and GUs.  Do not bring messy items to eat during the event such as crackers, muffins, fruit, or any food item that will crumble and dirty the pool area. Each athlete is different in his/her caloric needs.  Assuming you start with a full fuel tank, plan on consuming 150-300 calories per hour during the swim; this is merely a general guideline.  Fuel early and fuel often during the event; DO NOT wait until you feel tired or hungry or thirsty.    
  • LANE ETIQUETTE: Please make sure everyone in your lane has space to finish on the wall (slide over when you touch the wall).  Be courteous to other swimmers, the coaches, and the lifeguards; disrespectful behavior will not be tolerated.  Listen to the CRM coaches on deck; they have the final say when making decisions.  Thank you.
  • ROTATE THE LANE LEADER: Swimmers are encouraged to rotate the lane leader every ten 100's, however, your lane must stay on the original send-off time in order to stay on the correct count. 
  • LANE ORGANIZATION BY INTERVAL20 Short Course Yards (SCY) Lanes run slowest to fastest from the 6-Lane Pool and middle deep, to the 8-Lane pool.   We will accommodate everyone.  Most swimmers choose an interval of about 10 seconds slower than their normal base interval for training.
  • INTERVAL TIMES:  Below are base intervals with the corresponding total time needed to complete 100x100, listed in Hours, Minutes, and Seconds. Most swimmers choose an interval of about 10 seconds slower than their normal base interval for training.


A good place to start is 10-15 seconds slower than your base interval, however, it also depends on your endurance and fitness level. Some swimmers can complete the 100x100 close to their base interval, while others will need to take it much slower in order to finish. Error on the conservative side (choose a larger interval) so you will have a better chance of finishing.

Interval                     Total Time

2:20                         3:53:20

2:15                         3:45:00

2:10                         3:36:40

2:05                         3:28:20

2:00                         3:20:00

1:55                         3:11:40

1:50                         3:03:20

1:45                         2:55:00

1:40                         2:46:40

1:35                         2:38:20

1:30                         2:30:00

1:25                         2:21:40

1:20                         2:13:20

1:15                         2:05:00

1:10                         1:56:40

1:05                         1:48:20

1:00                         1:40:00    



No matter how slow you go, you are still lapping everybody on the couch.