Guy Smith set the fastest time in the opening practice session at the Baltimore Grand Prix for the American Le Mans Series. The British driver posted a lap of 1:31.202 (80.525mph) lap in Dyson Racing's Mazda-powered Lola around the 2.1-mile, 12-turn street circuit through Baltimore, Md. Practice was delayed for several hours while modifications were made to the new temporary downtown circuit, including repaving of the railroad track crossing on Pratt Street (LEFT).

Smith was 0.599sec quicker than Intersport Racing's Kyle Marcelli, the quickest of the LMP Challenge cars at 1:31.801 (79.999mph). The young Canadian was 0.227sec clear of CORE Autosport's Gunnar Jeannette in another LMPC entry.

Steven Kane was fourth overall and second in LMP1 for Oryx Dyson Racing at 1:32.562 (79.341mph). Team Falken Tire's Wolf Henzler was the fastest GT driver in his Porsche 911 GT3 RSR entry at 1:34.333 (77.852mph). The German, who won two races ago with Bryan Sellers at Mid-Ohio, was 0.381sec better than Corvette Racing's Jan Magnussen and 0.474 ahead of BMW Team RLL's Joey Hand.

Jeroen Bleekemolen went fastest for Black Swan Racing in GT Challenge. Driving a Porsche 911 GT3 Cup, his lap of 1:38.877 (74.274 mph) was 0.953 seconds quicker than Alex Job Racing's Leh Keen. Craig Stanton was third in class for Magnus Racing at 1:40.242 (73.263mph).

The second ALMS practice session is set for 6:05 to 6:20 p.m, following the opening practice for the IZOD IndyCar Series GT qualifying will start at 6:25 p.m., and prototype qualifying at 6:45 p.m.