Mainline Slide

  • Hosted By: Lower Merion High School Crew (Ardmore)

Come to the MainLine Slide on January 28, 2024

The MainLine Slide is an indoor rowing competition for junior, master, novice, collegiate, adaptive and fitness rowers. 

All races are 2000m unless otherwise noted on the event list

Entry fee of $25 per in-person event ($30 day of event); Team events $25


Register by clicking on the 'Registration Form' in the left panel or the blue register button in the upper right corner . Please note that your age category will be based on what your age is on December 31, 2024, not your age on the day of the race itself.

Walk-ins will be accepted the day of the the MainLine Slide if events are not already full.  NO changes or additions can be made less than 30 minutes prior to an event

RACE ERGs For Sale

Gently used race ergs are available for purchase while supplies last.  The Concept2 Model D/PM5 Indoor Rower is regularly $990 + $55 shipping + PA sales tax, but we have lightly used race ergs for a great price of $900, pick-up only, no PA sales tax. These are black Model Ds with a PM5 monitor from Concept2 in excellent condition stored in an indoor facility. Please contact us for bulk purchases. To reserve an erg a nonrefundable $150 deposit is required. Ergs will be available for pick up only at the conclusion of the 2024 MainLine Slide event.

To reserve your erg, please send an email to: [email protected]



Athlete check-in opens at 6:30 AM Sunday 01/28/2024 and closes one hour prior to the scheduled event time.

Rowers and their coaches are expected to complete the check-in process in a timely manner to allow the rower to become oriented and to warm up before the event. Assume there will be a line. It is the responsibility of the rower to be at the venue early enough to complete check-in and weigh-in.

Refunds will not be granted for late arrivals. Schedule may be condensed, if events aren't filled.

Athletes competing under a false name, birthdate or for another competitor will be disqualified.



All competitors must have a current USRowing waiver completed when registering online and bring it to check-in. Also participants must sign the MainLine Slide waiver and bring to check-in. Minors (under 18) must have a parent or guardian’s signature. No exceptions. See link in the left column under COMPLIANCE.


Lightweights and Weigh-In

Check-in first.

Any competitor in a lightweight event must weigh in on race day during the 1-hour window beginning two hours before and ending one hour before their race time. For example, if you are scheduled to race at 12PM, you must weigh in between 10AM and 11AM. No exceptions. Weigh-in is located next to the check-in table.

Athletes who registered as a lightweight and fail to weigh in for any reason will be moved to the corresponding open weight event. Weight limits are in accordance with US Rowing Rule 11-403

Mens Open Lightweight is 165 lbs max (75 Kg)

Mens Youth Lightweight is 150 lbs max (Non-World Indoor Rowing Race)

Womens Lightweight Open is 135 lbs max (61.5kg)

Womens Youth Lightweight is 130 lbs max (Non-World Indoor Rowing Race)

Coxswain Men is 120 lbs and under 

Coxswain Women is 110 lbs and under

Weigh-in attire is required. This is limited to a minimum of a unisuit or shorts and a top that covers the torso. There are no naked weigh-ins.

Athletes who successfully weigh-in will receive a wristband to confirm their lightweight classification.

Middle School Athletes

Must be 14 years or younger on the date of the event AND enrolled in middle or elementary school.


Event times posted on Regatta Central are approximate and the schedule is subject to change. Please check the schedule after 10pm the day before the Regatta. Schedule may be condensed day of the event if there are no racers in a prior event. Late Entries or changes, will not be accepted within 30mins of a scheduled race.


Medals are awarded to the top three finishers (or team members in the case of relays) in each in-person event with 5 or more entries. In-Person events with 4 or less entries will have a medal awarded for first place only. 


Due to scheduling limitations it is not possible to set a snow date.

In the case of extreme weather, cancellation notices will be posted on RegattaCentral.

Any decision to cancel the Main Line Slide will be made by Lower Merion School District staff in consultation with Main Line Slide staff.

We are unable to offer refunds.


Coxswain Clinic: Join the Coxswain Clinic during the MainLine Slide- $30 a rower-Sign up found on event list. This clinic will be held from 8:00 to 9:30 AM.

Contact Kirk Beckman
Email [email protected]
Phone Please contact regatta via email
Chief Referee Not yet posted
Juniors Yes
High School Yes
Middle School No
Collegiate Yes
Open Yes
Masters Yes
Elite No
Para Yes
Inclusion No
Entry Fees (USD)
Standard Cost
Coxswain Clinic $30.00
In Person $25.00
Team Events $25.00
Plus taxes if applicable