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No Entry Fee or Racing License Required for LRDC Members to Participate in Club Races.

Every Lime Rock Drivers Club  member becomes a really good high performance driver, many members want to take it further and go racing. This can be achieved in various ways, but the start for everyone is to get a racing license. 


The LRDC Race Series was created for those that want a fun, lower cost, less time consuming format that doesn’t require a formal license, just a sign off by the Club Director.  Wherever they end up racing our mission for our rookies and existing members is to elevate them to be the best racers that they can be. 

     Spec Miata Safety 

     Rules and Regulations 

  • Helmets must have a Snell or FIA 2015 rating or later

  • Hans device required

  • Fireproof suits, gloves, shoes and socks

  • Fire bottles & fire systems up to date & full

  • Harnesses & seats up to date with proper functioning releases

  • All body panels secure & tight

  • Wheels & tires in good condition

  • Brake lights working

  • No holes between the engine compartment and the driver's cabin

Spec Miata Racing Regulations 

Grid position for race 1 determined by qualifying (all groups). Grid position for race 2 will be determined by qualifying. Overall winner will be determined like golf; lowest score over the two races. Points to be awarded by finishing position.

  • Practice & Qualifying are combined for each course - twenty minutes (time permitting).

  • Races will be of thirty minutes (not a designated number of laps) including any pace laps and a slowing down lap, (time permitting).

  • Race Control reserves the right to change the timing and length of any track session due to unforeseen circumstances. For example, rain ten minutes before the start of a race.

  • The Alternate track layout races will be the last race of the day.

  • Spec Miata’s are to use the SCCA mandated Hoosier race tire.

  • All competitors may use a maximum of two sets of tires per race weekend

  • Proper SCCA Stamped Restrictor Plate (SM only, 38mm for cars 99-00 / 40mm for cars 01-05)

  • OEM Intake and Exhaust Manifolds


  • SCCA Legal Springs and Dampers must be used​

  • Courses used:  Classic Course - This course uses neither of the alternate chicanes, IMSA 1 - This course uses alternate Uphill only, IMSA 2 - This course uses both alternate Uphill & alternate West Bend

Annual Miata Technical Inspection

  • For all qualified LRDC Spec Miata Racers, an Annual Tech Inspection will be performed prior to your first race event of the season. An "Annual Inspection" sticker will be applied to your vehicle and must show on the bottom right of the windshield for quick verification purposes on each race day in that year period. Restrictor plates, ECU, and engines will be sealed at your Annual Tech Inspection.  If a seal is broken, for any reason, a new inspection must occur prior to the next race event.

  • All racing gear must be inspected during this Annual Inspection as well and you must display your "Passed" sticker on the left-hand side of your helmet for quick verification purposes.  Drivers must be in compliance with manufacturers fire suppression certification schedule and harnesses and seats have to be within manufacturers certification.

  • LRDC will randomly check seals after qualifying and racing.

  • All Mazda Miata race engines may be checked on a portable rolling road dynamometer at some point in the racing calendar. The top 3 cars in each class plus any other cars that show abnormal HP will be measured.

  • All Mazda Miata’s will be subject to random weigh-ins.


Mazda Series Dates 2023

Race 1 & 2: Saturday, April 15

Race 3 & 4: Saturday, May 20

Race 5 & 6: Saturday, June 24

Race 7 & 8: Saturday, July 29

Race 9 & 10: Saturday, September 30 

(race dates subject to change)

Click Here for Spec Miata Race Rental

Tortoise & Hare Time Trials (T&H) Rules

All member cars are welcome!  

  • Street cars are eligible

  • No race suits or HANS device required

  • Tire choice is free

  • Start time will be determined by qualifying times while factoring in your sandbagging quotient

  • Cars must meet the muffled day decibel requirement. Specifically, 88 dB or less

  • Stop and go penalty will apply for any car that initiates any contact, tbd by race director

  • No blocking allowed (rule explanation in drivers meeting)

  • Stop and go penalty for ignoring command flags

  • Exclusion for dangerous driving or repeated non-compliance with command flags

  • Cars will be required to pass safety tech prior to racing.

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