The 2012 Catalan motorcycle Grand Prix was the fifth round of the 2012 Grand Prix motorcycle racing season and the 17th Catalan motorcycle Grand Prix. It took place on the weekend of 1–3 June 2012 at the Circuit de Catalunya in Montmeló, Barcelona, Spain. The three classes of motorcycle racing which took place during the weekend were MotoGP, Moto2 and Moto3. Casey Stoner qualified on pole position in MotoGP, but it was his Repsol Honda teammate, Dani Pedrosa, who started in fifth place that took the lead at the first corner. Ben Spies was in second place for the first three laps, but slid off the track when challenging for the lead. This allowed the other factory Yamaha rider and championship leader Jorge Lorenzo to move up into second place and engage in a race long battle for the win with Pedrosa. Meanwhile, Stoner was behind the Tech 3 Yamaha of Andrea Dovizioso, and was battling with the other of Cal Crutchlow. He eventually beat Crutchlow to take fourth place whilst Dovizioso took the first podium of the year for the Tech 3 Yamaha team. As a consequence of the race, Lorenzo increased his lead in the riders' standings to 20 points over Stoner. Pedrosa remained third in the standings, with 30 fewer points than Lorenzo. In Moto2, Marc Márquez took his fourth consecutive pole position by beating championship leader and fellow Spaniard Pol Espargaró by two-tenths of a second. Thomas Lüthi completed the front row with Andrea Iannone in fourth place; it was these four riders who dominated the race, staying in close company for the majority of it too. Iannone led almost every lap to take the victory, but had to resist pressure in the closing laps to take his first win of the season. Lüthi finished second and Márquez finished third after winning an appeal against a one-minute penalty issued by the FIM for a collision between himself and Espargaró, which had resulted in retirement of the Kalex rider with three laps remaining. The result rearranged the order in the riders' standings with Lüthi now leading the way on 88 points with Márquez only 2 behind. Not far behind them were Espargaró and Iannone, still firmly in contention, on 71 and 70 points respectively, the reduced gap down to the Italian's victory. The Moto3 race was not as close as the one in the other two categories