Prototype Challenge - 2025 Season 4 - Fixed
Prototype Challenge – Fixed - iRacing
Sep 16, 2025
-
Dec 08, 2025
Active Season
iRacing
Events
Prototype Challenge - 2025 Season 4 - Fixed - Week 1 - Sebring International Raceway (International)
Sports Car
Official
Live
Sebring International Raceway
(International)
USA
iRacing Prototype Challenge – Fixed Week 0
70 time slots
Prototype Challenge - 2025 Season 4 - Fixed - Week 2 - Fuji International Speedway (Grand Prix)
Sports Car
Official
Scheduled
Round 2
Fuji International Speedway
(Grand Prix)
Japan
iRacing Prototype Challenge – Fixed Week 1
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 3 - Road Atlanta (Full Course)
Sports Car
Official
Scheduled
Round 3
Road Atlanta
(Full Course)
USA
iRacing Prototype Challenge – Fixed Week 2
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 4 - Autodromo Internazionale Enzo e Dino Ferrari (Grand Prix)
Sports Car
Official
Scheduled
Round 4
Autodromo Internazionale Enzo e Dino Ferrari
(Grand Prix)
Italy
iRacing Prototype Challenge – Fixed Week 3
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 5 - Algarve International Circuit (Grand Prix)
Sports Car
Official
Scheduled
Round 5
Algarve International Circuit
(Grand Prix)
Portugal
iRacing Prototype Challenge – Fixed Week 4
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 6 - Circuit des 24 Heures du Mans (24 Heures du Mans)
Sports Car
Official
Scheduled
Round 6
Circuit des 24 Heures du Mans
(24 Heures du Mans)
France
iRacing Prototype Challenge – Fixed Week 5
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 7 - Autódromo Hermanos Rodríguez (Grand Prix)
Sports Car
Official
Scheduled
Round 7
Autódromo Hermanos Rodríguez
(Grand Prix)
Mexico
iRacing Prototype Challenge – Fixed Week 6
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 8 - Autodromo Nazionale Monza (Grand Prix)
Sports Car
Official
Scheduled
Round 8
Autodromo Nazionale Monza
(Grand Prix)
Italy
iRacing Prototype Challenge – Fixed Week 7
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 9 - Canadian Tire Motorsports Park
Sports Car
Official
Scheduled
Round 9
Canadian Tire Motorsports Park
(Default)
Canada
iRacing Prototype Challenge – Fixed Week 8
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 10 - Daytona International Speedway (Road Course)
Sports Car
Official
Scheduled
Round 10
Daytona International Speedway
(Road Course)
USA
iRacing Prototype Challenge – Fixed Week 9
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 11 - Nürburgring Grand-Prix-Strecke (BES/WEC)
Sports Car
Official
Scheduled
Round 11
Nürburgring Grand-Prix-Strecke
(BES/WEC)
Germany
iRacing Prototype Challenge – Fixed Week 10
No scheduled sessions
Prototype Challenge - 2025 Season 4 - Fixed - Week 12 - Circuit de Spa-Francorchamps (Grand Prix Pits)
Sports Car
Official
Scheduled
Round 12
Circuit de Spa-Francorchamps
(Grand Prix Pits)
Belgium
iRacing Prototype Challenge – Fixed Week 11
No scheduled sessions