The 1999 Rose City Grand Prix was the fifth round of the 1999 American Le Mans Series season. It took place at Portland International Raceway, Oregon, on August 1, 1999.

Race results

Class winners in bold.

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	LMP	1	Panoz Motor Sports	David Brabham Éric Bernard	Panoz LMP-1 Roadster-S	M	137
					Ford (Élan-Yates) 6.0 L V8
2	LMP	42	BMW Motorsport Schnitzer Motorsport	JJ Lehto Steve Soper	BMW V12 LMR	M	137
					BMW S70 6.0 L V12
3	LMP	2	Panoz Motor Sports	Johnny O'Connell Jan Magnussen	Panoz LMP-1 Roadster-S	M	137
					Ford (Élan-Yates) 6.0 L V8
4	LMP	43	BMW Motorsport Schnitzer Motorsport	Joachim Winkelhock Bill Auberlen	BMW V12 LMR	M	136
					BMW S70 6.0 L V12
5	LMP	27	Price & Bscher	Thomas Bscher Pedro Lamy	BMW V12 LM	Y	134
					BMW S70 6.0 L V12
6	LMP	16	Dyson Racing	Elliott Forbes-Robinson James Weaver Ron Fellows	Riley & Scott Mk III	G	134
					Ford 5.0 L V8
7	LMP	0	Team Rafanelli SRL	Érik Comas Mimmo Schiattarella	Riley & Scott Mk III	Y	134
					Judd GV4 4.0 L V10
8	LMP	38	Champion Racing	Allan McNish Andy Pilgrim	Porsche 911 GT1 Evo	M	133
					Porsche 3.2 L Turbo Flat-6
9	LMP	11	Doyle-Risi Racing	Max Angelelli Didier de Radiguès	Ferrari 333 SP	P	131
					Ferrari F310E 4.0L V12
10	LMP	18	Dollahite Racing	Bill Dollahite Mike Davies	Ferrari 333 SP	P	130
					Ferrari F310E 4.0 L V12
11 DNF	LMP	12	Doyle-Risi Racing	Alex Caffi Wayne Taylor	Ferrari 333 SP	P	129
					Ferrari F310E 4.0 L V12
12	LMP	36	Doran Lista Racing Jim Matthews Racing	Stefan Johansson Jim Matthews	Ferrari 333 SP	M	128
					Ferrari F310E 4.0 L V12
13	GTS	91	Dodge Viper Team Oreca	Olivier Beretta David Donohue	Dodge Viper GTS-R	M	126
					Dodge 8.0 L V10
14	GTS	92	Dodge Viper Team Oreca	Karl Wendlinger Tommy Archer	Dodge Viper GTS-R	M	126
					Dodge 8.0 L V10
15	GTS	61	Konrad Motorsport	Franz Konrad Bob Wollek	Porsche 911 GT2	D	125
					Porsche 3.6 L Turbo Flat-6
16 DNF	LMP	28	Intersport Racing	Jon Field Niclas Jönsson	Lola B98/10	G	124
					Ford (Roush) 6.0 L V8
17	GTS	56	Martin Snow Racing	Martin Snow Kelly Collins	Porsche 911 GT2	M	123
					Porsche 3.6 L Turbo Flat-6
18†	GT	23	Manthey Racing Alex Job Racing	Dirk Müller Cort Wagner	Porsche 911 GT3-R	M	122
					Porsche 3.6 L Flat-6
19	GT	7	Prototype Technology Group	Brian Cunningham Christian Menzel	BMW M3	Y	121
					BMW 3.2 L I6
20	GT	10	Prototype Technology Group	Darren Law Johannes van Overbeek	BMW M3	Y	121
					BMW 3.2 L I6
21	GT	17	Contemporary Motorsports	Joe Varde Bruno Lambert	Porsche 911 Carrera RSR	?	120
					Porsche 3.8 L Flat-6
22	GT	02	Reiser Callas Rennsport	Doc Bundy David Murry	Porsche 911 Carrera RSR	P	120
					Porsche 3.8 L Flat-6
23 DNF	GT	6	Prototype Technology Group	Peter Cunningham Mark Simo	BMW M3	Y	119
					BMW 3.2 L I6
24	GT	22	Alex Job Racing	Mike Fitzgerald Darryl Havens	Porsche 911 Carrera RSR	Y	119
					Porsche 3.8 L Flat-6
25	GT	68	The Racer's Group	Spencer Trenery Vic Rice	Porsche 911 Carrera RSR	G	119
					Porsche 3.8 L Flat-6
26	GT	24	Alex Job Racing	Randy Pobst Don Kitch	Porsche 911 Carrera RSR	Y	119
					Porsche 3.8 L Flat-6
27	GT	03	Reiser Callas Rennsport	Grady Willingham Joel Reiser Craig Stanton	Porsche 911 Carrera RSR	P	118
					Porsche 3.8 L Flat-6
28 DNF	GTS	48	Freisinger Motorsport	Wolfgang Kaufmann Michel Ligonnet	Porsche 911 GT2	D	115
					Porsche 3.6 L Turbo Flat-6
29	LMP	63	Downing Atlanta	Jim Downing Chris Ronson	Kudzu DLY	G	115
					Mazda R26B 2.6 L 4-Rotor
30 DNF	LMP	97	Team Cascadia	Ed Zabinski Shane Lewis	Lola B98/10	P	113
					Chevrolet 6.0 L V8
31	LMP	29	Intersport Racing	Paul Debban Bruce Trenery	Riley & Scott Mk III	G	111
					Ford (Roush) 6.0 L V8
32	GT	65	Pregrid Motorsports	John Brosius Jonathan Fay	Porsche 911 3.8 Cup	?	110
					Porsche 3.8 L Flat-6
33	LMP	8	Transatlantic Racing	Scott Schubot Henry Camferdam	Riley & Scott Mk III	G	108
					Ford 5.0 L V8
34 DNF	GTS	55	Saleen/Allen Speedlab	Terry Borcheller Ron Johnson	Saleen Mustang SR	P	106
					Ford 8.0 L V8
35 DNF	GT	25	RWS Motorsport	Hans-Jörg Hofer Luca Riccitelli	Porsche 911 GT3-R	M	86
					Porsche 3.6 L Flat-6
36 DNF	GTS	83	Chiefie Motorsports	Stefano Buttiero Zak Brown	Porsche 911 GT2	?	70
					Porsche 3.6 L Turbo Flat-6
37 DNF	LMP	74	Robinson Racing	George Robinson Jack Baldwin	Riley & Scott Mk III	?	49
					Chevrolet 6.0 L V8
38 DNF	LMP	27	Doran Lista Racing	Didier Theys Fredy Lienhard	Ferrari 333 SP	M	41
					Ferrari F310E 4.0 L V12
39 DNF	LMP	15	Hybrid R&D	Chris Bingham Ross Bentley	Riley & Scott Mk III	Y	34
					Ford 5.0 L V8
40 DNF	LMP	20	Dyson Racing	Butch Leitzinger Elliott Forbes-Robinson	Riley & Scott Mk III	G	9
					Ford 5.0 L V8
41 DNF	GT	9	Prototype Technology Group	Boris Said Hans-Joachim Stuck	BMW M3	Y	8
					BMW 3.2 L I6
42 DNF	GT	67	The Racer's Group	Kevin Buckler Kim Wolfkill Kimberly Hiskey	Porsche 911 Carrera RSR	G	0
					Porsche 3.8 L Flat-6

† - #18 Manthey Racing was found to be in violation of PSCR regulations in post-race inspection, the car being below the minimum legal ride height. Manthey Racing and their drivers were penalized by not winning championship points in this round.

Statistics

• Pole position - #42 BMW Motorsport (J.J. Lehto) - 1:04.387
• Fastest lap - #42 BMW Motorsport (J.J. Lehto) - 1:05.451
• Distance - 428.613 km (266.328 mi)
• Average speed - 155.033 km/h (96.333 mph)