The 2019 Sahlen's Six Hours of the Glen was an endurance race sanctioned by the International Motor Sports Association (IMSA). The race was held at Watkins Glen International in Watkins Glen, New York on the June 30th, 2019. This race was the sixth round of the 2019 WeatherTech SportsCar Championship, as well as the third round of the 2019 Michelin Endurance Cup.
IMSA released two separate technical bulletins regarding the Balance of Performance for the six-hour race. The first one was released on May 23rd, 2019, for the GT Le Mans (GTLM) class. This was done to allow IMSA teams who were preparing for the 24 Hours of Le Mans in three weeks time, notably Corvette Racing and Chip Ganassi Racing, to have the beforehand knowledge of the Balance of Performance for the race so they could prepare better. In this bulletin, the BMW M8 GTE received a 12 horsepower increase, as well as a six liter increase in fuel capacity and turbo boost increase. The second technical bulletin was released on June 19th, 2019, which regarded the Balance of Performance for the Daytona Prototype International (DPi) and GT Daytona (GTD) classes. In DPi, after winning the previous two events, Team Penske's Acura ARX-05 was given a 15 kilogram weight increase, giving it the same weight as the Nissan DPi. The Cadillac DPi-V.R was given a 1 liter reduction in fuel capacity. In GT Daytona, despite no McLarens participating in the 6 Hour event, the McLaren 720S was given a power increase of 15 horsepower and made 25 kilograms lighter, in addition to a 12-liter fuel capacity increase. These adjustments made the McLaren 720S the lightest car in the class, as well as having the largest fuel capacity.
On June 19th, 2019, the entry list for the 6-hour-event was released, featuring 37 cars. There were 11 entries in Daytona Prototype international, eight cars in GT Le Mans, 16 in GT Daytona, and just two entrants in the Le Mans Prototype (LMP2) class. In GT Daytona, Sprint-race-only entrants Compass Racing and Lone Star Racing would not be taking part, while endurance-event-only entrants such as Land-Motorsport made their return. Black Swan Racing also returned to the grid after missing the 12 Hours of Sebring due to their team owner Tim Pappas sustaining an injury. As he was still recovering, Marc Miller took his place for The Glen. Joey Hand made a full recovery from suffering symptoms of the flu, and returned to the Chip Ganassi Racing team after being replaced by Sebastien Bourdais for the previous two rounds.
Practice and qualifying
Pole positions in each class are indicated in bold and by .
|1||DPi||77||Mazda Team Joest||Oliver Jarvis||1:29.639||_||1|
|2||DPi||6||Acura Team Penske||Dane Cameron||1:29.862||+0.223||2|
|3||DPi||7||Acura Team Penske||Ricky Taylor||1:29.928||+0.289||3|
|4||DPi||55||Mazda Team Joest||Harry Tincknell||1:29.983||+0.344||4|
|5||DPi||10||Konica Minolta Cadillac||Renger van der Zande||1:30.758||+1.119||5|
|6||DPi||5||Mustang Sampling Racing||Filipe Albuquerque||1:31.170||+1.531||6|
|7||DPi||31||Whelen Engineering Racing||Felipe Nasr||1:31.177||+1.538||7|
|8||LMP2||52||PR1/Mathiasen Motorsports||Gabriel Aubry||1:31.735||+2.096||8|
|9||DPi||85||JDC-Miller Motorsports||Misha Goikhberg||1:32.316||+2.677||9|
|10||DPi||84||JDC-Miller Motorsports||Simon Trummer||1:32.409||+2.770||10|
|11||LMP2||38||Performance Tech Motorsports||Kyle Masson||1:32.459||+2.820||11|
|12||DPi||50||Juncos Racing||René Binder||1:33.134||+3.495||12|
|13||DPi||54||CORE Autosport||Jonathan Bennett||1:33.466||+3.827||13|
|14||GTLM||3||Corvette Racing||Antonio García||1:40.799||+11.160||14|
|15||GTLM||67||Ford Chip Ganassi Racing||Richard Westbrook||1:41.116||+11.477||15|
|16||GTLM||4||Corvette Racing||Tommy Milner||1:41.291||+11.652||16|
|17||GTLM||24||BMW Team RLL||John Edwards||1:41.301||+11.662||17|
|18||GTLM||66||Ford Chip Ganassi Racing||Joey Hand||1:41.304||+11.665||18|
|19||GTLM||25||BMW Team RLL||Connor De Phillippi||1:41.414||+11.775||19|
|20||GTLM||911||Porsche GT Team||Nick Tandy||1:41.545||+11.906||20|
|21||GTLM||912||Porsche GT Team||Laurens Vanthoor||1:42.206||+12.567||21|
|22||GTD||86||Meyer-Shank Racing with Curb-Agajanian||Trent Hindman||1:44.978||+15.339||22|
|23||GTD||57||Heinricher Racing with Meyer-Shank||Christina Nielsen||1:45.295||+15.656||23|
|24||GTD||96||Turner Motorsport||Dillon Machavern||1:45.506||+15.867||24|
|25||GTD||63||Scuderia Corsa||Jeff Westphal||1:45.595||+15.856||25|
|26||GTD||29||Montaplast by Land-Motorsport||Ricardo Feller||1:45.597||+15.858||26|
|27||GTD||9||Pfaff Motorsports||Zacharie Robichon||1:45.842||+16.203||27|
|28||GTD||33||Mercedes-AMG Team Riley Motorsports||Ben Keating||1:45.961||+16.322||28|
|29||GTD||14||AIM Vasser Sullivan||Richard Heistand||1:46.066||+16.427||29|
|30||GTD||540||Black Swan Racing||Marco Seefried||1:46.100||+16.461||30|
|31||GTD||47||Precision Performance Motorsports||Brandon Gdovic||1:46.388||+16.749||31|
|32||GTD||48||Paul Miller Racing||Ryan Hardwick||1:46.620||+16.981||32|
|33||GTD||44||Magnus Racing||John Potter||1:47.041||+17.402||33|
|34||GTD||8||Starworks Motorsport||Parker Chase||1:48.041||+18.402||34|
|35||GTD||73||Park Place Motorsports||Nicholas Boulle||1:48.923||+19.284||35|
|36||GTD||12||AIM Vasser Sullivan||None||No time||_||36|
Class winners are denoted in bold and .
- The #19 crew of Moorespeed did not make the start due to sustaining too much damage in an accident in free practice.
- Dagys, John (23 May 2019). "BMWs Gets Power Increase for Watkins Glen". sportscar365.com. John Dagys Media. Retrieved 23 June 2019.
- "IMSA TECHNICAL BULLETIN IWSC #19-25" (PDF). 22 May 2019. Retrieved 23 June 2019.
- Dagys, John (19 June 2019). "Acura DPis Hit With Weight Increase for Watkins Glen". sportscar365. John Dagys Media. Retrieved 23 June 2019.
- "IMSA TECHNICAL BULLETIN IWSC #19-28" (PDF). 19 June 2019. Retrieved 23 June 2019.
- Dagys, John (19 June 2019). "Black Swan Returns; 37 Entries for The Glen". sportscar365.com. John Dagys Media. Retrieved 23 June 2019.
- "27-30 June 2019 Sahlen's Six Hours of the Glen Results -- Qualifying.PDF" (PDF). 29 June 2019. Retrieved 11 July 2019.