The 2013 International Sports Car Weekend was a sports car race held at Circuit of the Americas in Austin, Texas on September 21, 2013. The race was the eighth round of the 2013 American Le Mans Series.

American Le Mans Series (ALMS) president Scott Atherton confirmed the race was part of the schedule for the 2013 American Le Mans Series schedule in October 2012.^[1] It was the first year the event was held as part of the American Le Mans Series. The 2013 International Sports Car Weekend was the eighth of ten scheduled sports car races of 2013 American Le Mans Series.^[2] The race was held at the twenty-turn 3.426 mi (5.514 km) Circuit of the Americas in Austin, Texas on September 21, 2013.^[1] The event was run alongside the FIA World Endurance Championship event as a double-header.^[2]

Pole positions in each class are indicated in bold and by ‡.

Pos.	Class	No.	Entry	Driver	Time	Gap	Grid
1	P1	6	Muscle Milk Pickett Racing	Lucas Luhr	2:07.851	—	1‡
2	P1	16	Dyson Racing Team	Chris McMurry	2:12.837	+4.986	2
3	P1	0	DeltaWing Racing Cars	Andy Meyrick	2:15.845	+7.994	3
4	P2	552	Level 5 Motorsports	Marino Franchitti	2:10.573	+2.722	4‡
5	P2	01	Extreme Speed Motorsports	Anthony Lazzaro	2:11.869	+4.018	281
6	P2	02	Extreme Speed Motorsports	Johannes van Overbeek	2:12.100	+4.219	291
7	P2	551	Level 5 Motorsports	No Time Established			5
8	PC	81	DragonSpeed	Renger van der Zande	2:17.865	+10.014	6‡
9	PC	5	Starworks Motorsport	Ryan Dalziel	2:18.929	+11.078	301
10	PC	8	BAR1 Motorsports	Kyle Marcelli	2:19.782	+11.931	7
11	PC	9	RSR Racing	Bruno Junqueira	2:20.018	+12.167	311
12	PC	05	CORE Autosport	Tom Kimber-Smith	2:20.340	+12.489	8
13	PC	52	PR1/Mathiasen Motorsports	Dane Cameron	2:20.722	+12.871	321
14	PC	18	Performance Tech Motorsports	Tristan Nunez	2:20.935	+13.084	9
15	PC	7	BAR1 Motorsports	Rusty Mitchell	2:22.438	+14.587	10
16	GT	55	BMW Team RLL	Joey Hand	2:17.178	+9.327	11‡
17	GT	3	Corvette Racing	Antonio García	2:17.442	+9.591	12
18	GT	4	Corvette Racing	Oliver Gavin	2:17.594	+9.743	13
19	GT	56	BMW Team RLL	John Edwards	2:18.002	+10.151	14
20	GT	06	CORE Autosport	Patrick Long	2:19.167	+11.316	15
21	GT	93	SRT Motorsports	Jonathan Bomarito	2:19.246	+11.395	16
22	GT	48	Paul Miller Racing	Bryce Miller	2:19.462	+11.611	17
23	GT	62	Risi Competizione	Matteo Malucelli	2:19.834	+11.983	331
24	GT	91	SRT Motorsports	Marc Goossens	2:20.088	+12.237	18
25	GT	17	Team Falken Tire	Bryan Sellers	2:21.134	+13.283	19
26	GT	23	Team West/AJR/Boardwalk Ferrari	Townsend Bell	2:21.704	+13.853	20
27	GTC	66	TRG	Damien Faulkner	2:27.816	+19.965	21‡
28	GTC	30	NGT Motorsport	Sean Edwards	2:27.880	+20.029	22
29	GTC	22	Alex Job Racing	Jeroen Bleekemolen	2:27.920	+20.069	23
30	GTC	27	Dempsey Racing/Del Piero	Andy Lally	2:28.533	+20.682	24
31	GTC	44	Flying Lizard Motorsports	Dion von Moltke	2:28.618	+20.767	25
32	GTC	11	JDX Racing	Jan Heylen	2:28.692	+20.841	26
33	GTC	45	Flying Lizard Motorsports	Spencer Pumpelly	2:29.353	+21.502	27
Sources:[3][4]

Notes:

• ^1  – The No. 01 and Extreme Speed Motorsports, the No. 5 Starworks Motorsport, the No. 9 RSR Racing, the No. 52 PR1/Mathiasen Motorsports, and the No. 62 Risi Competizione Ferrari were sent to the rear of their respective class fields beause their drivers did not meet minimum qualifying time.^[5]

Class winners in bold and ‡. Cars failing to complete 70% of their class winner's distance are marked as Not Classified (NC).

Pos Class No. Team Drivers Chassis Tire Laps Time/Retired Engine 1 P1 6 Muscle Milk Pickett Racing Klaus Graf Lucas Luhr HPD ARX-03c M 83 2:45:05.710‡ Honda LM-V8 3.4 L V8 2 P1 16 Dyson Racing Team Tony Burgess Chris McMurry Lola B12/60 M 81 +2 Laps Mazda MZR-R 2.0 L Turbo I4 (Isobutanol) 3 P2 551 Level 5 Motorsports Scott Tucker Ryan Briscoe HPD ARX-03b M 80 +3 Laps‡ Honda HR28TT 2.8 L Turbo V6 4 P2 552 Level 5 Motorsports Guy Cosmo Marino Franchitti Scott Tucker HPD ARX-03b M 80 +3 Laps Honda HR28TT 2.8 L Turbo V6 5 P2 02 Extreme Speed Motorsports Ed Brown Johannes van Overbeek HPD ARX-03b M 79 +4 Laps Honda HR28TT 2.8 L Turbo V6 6 P2 01 Extreme Speed Motorsports Anthony Lazzaro Scott Sharp HPD ARX-03b M 79 +4 Laps Honda HR28TT 2.8 L Turbo V6 7 PC 8 BAR1 Motorsports Kyle Marcelli Chris Cumming Oreca FLM09 C 79 +4 Laps‡ Chevrolet 6.2 L V8 8 PC 52 PR1/Mathiasen Motorsports Dane Cameron Mike Guasch Oreca FLM09 C 79 +4 Laps Chevrolet 6.2 L V8 9 PC 05 CORE Autosport Jon Bennett Tom Kimber-Smith Oreca FLM09 C 79 +4 Laps Chevrolet 6.2 L V8 10 PC 18 Performance Tech Motorsports Tristan Nunez Charlie Shears Oreca FLM09 C 78 +5 Laps Chevrolet 6.2 L V8 11 PC 81 DragonSpeed Mirco Schultis Renger van der Zande Oreca FLM09 C 78 +5 Laps Chevrolet 6.2 L V8 12 PC 9 RSR Racing Bruno Junqueira David Heinemeier Hansson Oreca FLM09 C 78 +5 Laps Chevrolet 6.2 L V8 13 GT 3 Corvette Racing Jan Magnussen Antonio García Chevrolet Corvette C6.R M 78 +5 Laps‡ Chevrolet 5.5 L V8 14 GT 93 SRT Motorsports Kuno Wittmer Jonathan Bomarito SRT Viper GTS-R M 78 +5 Laps SRT 8.0 L V10 15 GT 56 BMW Team RLL Dirk Müller John Edwards BMW Z4 GTE M 78 +5 Laps BMW 4.4 L V8 16 GT 55 BMW Team RLL Bill Auberlen Joey Hand BMW Z4 GTE M 77 +6 Laps BMW 4.4 L V8 17 GT 91 SRT Motorsports Marc Goossens Dominik Farnbacher SRT Viper GTS-R M 77 +6 Laps SRT 8.0 L V10 18 GT 62 Risi Competizione Olivier Beretta Matteo Malucelli Ferrari 458 Italia GT2 M 77 +6 Laps Ferrari 4.5 L V8 19 GT 17 Team Falken Tire Bryan Sellers Wolf Henzler Porsche 911 GT3-RSR F 76 +7 Laps Porsche 4.0 L Flat-6 20 GT 23 Team West/AJR/Boardwalk Ferrari Townsend Bell Bill Sweedler Ferrari 458 Italia GT2 Y 75 +8 Laps Ferrari 4.5 L V8 21 GTC 66 TRG Ben Keating Damien Faulkner Porsche 911 GT3 Cup Y 72 +11 Laps‡ Porsche 4.0 L Flat-6 22 GTC 30 NGT Motorsport Henrique Cisneros Sean Edwards Porsche 911 GT3 Cup Y 72 +11 Laps Porsche 4.0 L Flat-6 23 GTC 27 Dempsey Racing/Del Piero Patrick Dempsey Andy Lally Porsche 911 GT3 Cup Y 72 +11 Laps Porsche 4.0 L Flat-6 24 GTC 11 JDX Racing Mike Hedlund Jan Heylen Porsche 911 GT3 Cup Y 72 +11 Laps Porsche 4.0 L Flat-6 25 GTC 45 Flying Lizard Motorsports Spencer Pumpelly Nelson Canache Jr. Porsche 911 GT3 Cup Y 72 +11 Laps Porsche 4.0 L Flat-6 26 GTC 22 Alex Job Racing Cooper MacNeil Jeroen Bleekemolen Porsche 911 GT3 Cup Y 71 +12 Laps Porsche 4.0 L Flat-6 27 GTC 44 Flying Lizard Motorsports Seth Neiman Dion von Moltke Porsche 911 GT3 Cup Y 71 +12 Laps Porsche 4.0 L Flat-6 28 DNF PC 7 BAR1 Motorsports Tomy Drissi Rusty Mitchell Oreca FLM09 C 69 Suspension Chevrolet 6.2 L V8 29 DNF P1 0 DeltaWing Racing Cars Katherine Legge Andy Meyrick DeltaWing DWC13 B 66 Gearbox Élan (Mazda) 1.9 L Turbo I4 30 GT 48 Paul Miller Racing Bryce Miller Marco Holzer Porsche 911 GT3-RSR M 56 +27 Laps Porsche 4.0 L Flat-6 31 DNF GT 06 CORE Autosport Colin Braun Patrick Long Porsche 911 GT3-RSR M 53 Transmission Porsche 4.0 L Flat-6 32 DNF PC 5 Starworks Motorsport Ryan Dalziel John Pew Oreca FLM09 C 45 Overheating Chevrolet 6.2 L V8 33 DNF GT 4 Corvette Racing Oliver Gavin Tommy Milner Chevrolet Corvette C6.R M 26 Gearbox Chevrolet 5.5 L V8 Sources:[6][7]

Tyre manufacturers Key Symbol Tyre manufacturer B Bridgestone C Continental F Falken Tire M Michelin Y Yokohama