The 2011 Kobalt Tools 400 was a NASCAR Sprint Cup Series stock car race that was held on March 6, 2011, at Las Vegas Motor Speedway in Clark County, Nevada.

Polesitter Matt Kenseth maintained his lead on the first lap to begin the race, as Greg Biffle, who started in the fourth position on the grid, remained behind him.

Late in the race, Stewart was given a penalty for speeding on pit road, giving the lead to Edwards.

Edwards remained the leader to win for the second time at Las Vegas Motor Speedway.

The result moved Edwards up to the third position in the Drivers' Championship, seven points behind Stewart while being tied with Montoya.

Las Vegas Motor Speedway is one of ten intermediate tracks to hold NASCAR races.

[11] Montoya was just off Ragan's pace, followed by Carl Edwards, Greg Biffle, and Marcos Ambrose.

David Reutimann, Truex, Stewart, Logano, and Denny Hamlin rounded out the top ten positions.

[16] The race, the third in the season, began at 3:00 p.m. EST and was televised live in the United States on Fox.

[17] Las Vegas Motor Speedway Chaplain Joe Freiburger began pre-race ceremonies, by giving the invocation.

Next, Kristen Hertzenberg, from Phantom-Las Vegas Spectacular, performed the national anthem, and Gray Abercrombie, Lowe's sports marketing manager, gave the command for drivers to start their engines.

[17] Kenseth retained his pole position lead into the first corner, followed by Biffle, who started fourth.

Over the following two laps, Edwards fell to the fourth position, while Biffle passed Kenseth for the lead.

Most of the front runners made pit stops during the caution, while Jeff Gordon stayed out to become the leader.

On the 14th lap, Stewart remained the leader, while Kurt Busch moved to the second position ahead of Jeff Gordon.

[17] By lap 24, Stewart maintained a 1.7 second lead over Busch, as Gordon fell to sixth.

Stewart continued to increase his lead over the next ten laps, while Busch remained in the second position.

During lap 49, green flag pit stops began with Kurt Busch and Reutimann.

Once green flag pit stops concluded on lap 62, Stewart reclaimed the first position ahead of Kyle Busch.

On the following lap, Kurt Busch and Kahne spun sideways, prompting the fourth caution to be given.

On the lap 106 restart, Stewart remained the leader ahead of Edwards and Biffle in second and third.

On lap 138, Dale Earnhardt Jr. claimed the seventh position, while Truex fell to sixth.

Eleven laps later, the sixth caution was given because Gilliland collided into the wall after having a flat tire.

Most of the drivers made pit stops during the caution, as Stewart reclaimed the first position at the lap 202 restart.

On lap 220, Edwards passed Truex to claim third, as Stewart increased his lead to 3 seconds.

[17] Once the green flag pit stops concluded, Edwards was the leader, 1.1 seconds ahead of Montoya.

[19] Although Stewart was leading the race near the end, Edwards passed him after the final pit stops.

[17] Stewart, who finished second, said, "I don't know what happened on the pit stop there, but we had a miscue and had a penalty and had to go to the back, and unfortunately it kind of dealt our cards for us.

"[18] The race result moved Stewart into the first position in the Driver's Championship with 113 points, tied with Kurt Busch in second.