LapsHub
2
bart
1:25:545.4
Porsche 911 Carrera 2$ #482
+0.844s
Jul 28, 2024
Racetracks · Leaderboard
Grattan Raceway lap times
All-time lap times and live track day data in Belding, Michigan
Track Record
1:25:101.1
marek
3Drivers
1.4142086Miles
Track map
Reference line preview
1
marek
1:25:101.1
Porsche GT4 RS (2025) #7
Jul 28, 2024
3
jonathan
1:28:542.0
Porsche GT4 #43
+3.841s
Jul 28, 2024
All-time fastest laps
3 drivers
PosDriverCarLap TimeGap
1
marek
Porsche GT4 RS (2025) #7
1:25:101.1
-
2
bart
Porsche 911 Carrera 2$ #482
1:25:545.4
+0.844s
3
jonathan
Porsche GT4 #43
1:28:542.0
+3.841s
About Grattan Raceway
1.414-mile technical west Michigan club circuit
- 1.4142086 mi
- 13 turns
- Opened 1962
- Belding, Michigan
Grattan Raceway is a 1.414-mile, 13-turn circuit near Belding, Michigan. Opened in 1962, it is known for blind crests, camber, and sustained amateur road-racing use.
The 1.4142086-mile, 13 turns layout rewards smooth inputs and track knowledge, a lap that improves once you learn the braking markers and apexes.
Grattan Raceway is on the North American track-day calendar. Record laps in the LapsHub app with phone GPS or RaceBox telemetry, publish a verified lap when you are ready to chase a public leaderboard.
Notable features
- Blind crests: Several corners over blind rises, a technical Michigan lap.
- Off-camber corners: Camber changes punish imprecise lines.
- Club racing focus: A SCCA and Midwestern Council staple since 1962.
Live at Grattan Raceway
Live telemetry and video from the circuit
When drivers are on track at Grattan Raceway, LapsHub sends live lap times, GPS traces, and session data to the paddock feed. A low-latency live telemetry stream sends lap times, GPS, and session data to the paddock feed and the cloud while you drive. Live video feeds during track days and events let paddock crews and fans follow the action from the circuit or from anywhere.
- Live timing map shows who is on track, current lap times, and speeds as they happen
- Live video during track days and events, follow the action from the paddock or from home
- Phone GPS and RaceBox sessions both stream through the same live-event feed
Submit your lap
Beat the record at Grattan Raceway
Current record: 1:25:101.1 by marek
Download LapsHub, record with a RaceBox at 25 Hz and publish your lap, or upload video and telemetry evidence to submit a verified time for the public leaderboard.