The Daytona Twin 150s, known officially as the Gatorade Duel, consists of two 150-mile races that help determine the field for the Daytona 500. Originally, these began as two 100-mile races, then were changed to 125-mile races, and most recently were increased to two 150-mile races.

Each year on the Thursday before the main race, a pair of 150-mile races are held to determine the remaining drivers in the field. This page will provide updates of the Daytona Twin 150s.

Each year, the Daytona 500 is the first official NASCAR race of the season. It's also called the 'Super Bowl of Stock Car Racing' because of how popular the event has become.

The weekend before the race takes place, various drivers attempt to qualify with one of the fastest top two times. These two drivers are then locked into the front row for the actual race. In 2010, both Mark Martin and Dale Earnhardt Jr. qualified for the front row.

Then the rest of the field is determined with a pair of 150-mile races at Daytona International Speedway. The race is 60 laps in length and generally there is only one pit stop allowed for cars to re-fuel or make modifications to the car like changing to a fres set of tires.

Jimmie Johnson was the winner of the first qualifying race. Here are the top 10 results:

(1) Jimmie Johnson

(2) Kevin Harvick

(3) Kyle Busch

(4) Clint Bowyer

(5) Regan Smith

(6) Jamie McMurray

(7) A.J. Allmendinger

(8) Ryan Newman

(9) David Ragan

(10) Jeff Gordon

There were 3 caution flags, for which 11 of the 60 laps were run under the yellow flag, and there were eight lead changes in the race. The time of the race was 1 hour, 3 minutes, 23 seconds.

Kasey Kahne was the winner of the second qualifying race. Here are the top 10 results:

(1) Kasey Kahne

(2) Tony Stewart

(3) Juan Pablo Montoya

(4) Kurt Busch

(5) Elliott Sadler

(6) Martin Truex Jr.

(7) Joey Logano

(8) Marcos Ambrose

(9) David Reutimann

(10) Brian Vickers

The first three sets of 100-mile qualifying races took place in 1959. Bob Welborn won the first of these races. Four times in the history of the duals has a driver died. The last of these instances took place in 1987 with the death of Bruce Jacobi.

The legendary Dale Earnhardt struggled for years to win the actual Daytona 500, but dominated these qualifying races. He established records that still stand for winning one of these races each year for ten consecutive years, and a total of 12 of these races overall. These races do not count as official NASCAR races.

Jeff Gordon has also had a unique history with the Twin 150's. In 1993, when it was a twin 125, he won one of the qualifiers in his rookie season. In 2007, he also won one of the races but then failed a post-race inspection and was placed at the back of the field for the actual Daytona 500 later that weekend.

Eight times previously has a winner of a Gatorade Duel gone on to win the main race. The first of these was Fireball Roberts in 1962. Cale Yarborough turned the trick twice in 1977 and 1984. Bill Elliott in 1985, Bobby Allison in 1988, and Sterling Marlin in 1995, have also accomplished this feat. The last two to pull this unique double were the Earnhardts: father Dale won them both in 1998, and then his son Dale Jr. became the last to win both a Twin 150 and the main race in 2004.

Thank you for checking in with us during the Twin 150's. Be sure to check out our Daytona 500 Live Coverage on Sunday February 14 at 1PM EST.

SECOND RACE:

The race has concluded. Kasey Kahne won the race. Here are the top 10 results: (1) Kasey Kahne - (2) Tony Stewart - (3) Juan Pablo Montoya - (4) Kurt Busch - (5) Elliott Sadler - (6) Martin Truex Jr. - (7) Joey Logano - (8) Marcos Ambrose - (9) David Reutimann - (10) Brian Vickers

As of 5:00PM EST, just three laps remain. Tony Stewart has the lead, with Kasey Kahne, Kurt Busch, Elliot Sadler, and Sam Hornish Jr. rounding out the top five.

As of 4:40PM EST, 33 of the 60 laps were now completed. Kurt Busch has vaulted into the lead. Matt Kenseth trails by 0.114 seconds. Rounding out the top five are Brian Vickers, Sam Hornish Jr., and Kasey Kahne.

As of 4:30PM EST, 26 of the 60 laps have been completed. The current leader is Matt Kenseth. Kurt Busch is currently running in second. Juan Pablo Montoya, Dale Earnhardt Jr., and Sam Hornish Jr. round out the top five.

FIRST RACE:

The race has concluded. Jimmie Johnson won the race. Here are the top 10 results: (1) Jimmie Johnson - (2) Kevin Harvick - (3) Kyle Busch - (4) Clint Bowyer - (5) Regan Smith - (6) Jamie McMurray - (7) A.J. Allmendinger - (8) Ryan Newman - (9) David Ragan - (10) Jeff Gordon

There were 3 caution flags, for which 11 of the 60 laps were run under the yellow flag, and there were eight lead changes in the race. The time of the race was 1 hour, 3 minutes, 23 seconds.

As of 3:21PM EST, there are 2 laps to go; Jimmie Johnson has the lead over Kyle Busch, with Clint Bowyer, Jamie McMurray, and Kevin Harvick rounding out the top five.

As of 3:15PM EST, the race had six laps remaining but was under a yellow caution flag. Jimmie Johnson, the four-time defending NASCAR Sprint Cup series champ, had the lead. Kyle Busch, Greg Biffle, Ryan Newman, and Denny Hamlin round out the top five.

As of 3:10PM EST, the first race had just 13 laps remaining. The leader is [[Greg Biffle[[, followed by David Ragan, Kevin Harvick, Kyle Busch, and Ryan Newman rounding out the top five.

As of 3:00PM EST, the first race was being led by Greg Biffle after 34 of the 60 laps. Jeff Gordon has moved up to second place. The rest of the top five features Kyle Busch, David Ragan, and Mark Martin. Martin has already qualified on the first row, but most drivers that are already secured in the front row still use their back-up cars to practice.

As of 2:30PM EST, the first race was being led by Mark Martin after 24 of the 60 laps. A.J. Allmendinger is currently second, followed by Kyle Busch, Greg Biffle, and Jeff Gordon.

1. Final Results:

2. Dale Earnhardt Jr

3. Reed Sorenson

4. Ryan Newman

5. Casey Mears

6. Carl Edwards

7. Those who qualified for Sunday's race today: Kenny Wallace and Brian Vickers, with Kurt Busch taking the former champions provisional spot; 5 Dodges, 4 Chevys and 1 Ford in Top 10

1. Final Results:

2. Denny Hamlin

3. Tony Stewart

4. Jeff Gordon

5. Casey Kahne

6. Mark Martin

7. Those who qualified for Sunday's race today: Dale Jarrett and John Andretti

• FINAL LAP: Denny Hamlin wins, with Andretti and Jarrett getting the provisional spots

• LAP 61: Hamlin passes Stewart for the lead - 1 lap to go - Jarrett will get in

• LAP 60: Now waiting for track to be cleared with 2nd Red Flag of the race, then we move into overtime mode. The current Top 5: Stewart, Hamlin, Gordon, Kahne, and Martin. The 2 provisional spots: Jarrett (6th) and Reutimann (10th), with Andretti (14th) and Schrader (18th) are chasing those.

• LAP 58: Andretti and Schrader come to pit row, Jarrett and Reutimann do not - these are the 4 battling for the final 2 spots Sunday, right now occupied by Jarrett and Reutimann.

• LAP 57: Top 2 cars (Stewart and Hamlin) are Toyotas - CRASH! - Carpentier hits the wall and damages a tire - yellow flag - will be settled in a white/green flag 2 lap shootout

• LAP 56: Transfer spots: Jarrett and Reutimann, followed closely by Carpentier and Andretti

• LAP 55: Top 5 with 5 to go: Stewart, Hamlin, Gordon, Martin, and Kahne.

• LAP 53: Stewart takes his first lead of the day, with Hamlin and Martin runnign behind

• LAP 52: Waltrip reporting his car is "a little loose" and Reutimann and Carpentier battling for final spot in race

• LAP 50: Ten laps to go... Jarrett trying to qualify for his final race prior to retirement

• LAP 49: Busch now moves back up front with Stewart and Gordon behind, then Martin and Hamlin, followed by Kahne, Jarrett, Waltrip, Harvick, and Reutimann.

• LAP 48: 80% of the race is complete, and right now Jarrett and Reutimann would qualify

• LAP 47: Busch up to 4th just behind Jarrett

• LAP 45: 3/4 of the way through the race, and now the tension mounts. Top 5: Harvick, Martin, Jarrett, Busch and Stewart. Waltrip is 6th and Gordon is 8th.

• LAP 43: Harvick takes the lead with Martin tight behind him

• LAP 42: Busch still setting the pace, followed by Harvick, Stewart, Martin, and Gordon

• LAP 40: Schrader dropping back - he could be done, and the drivers are fighting massive sun glare in Turn 4

• LAP 38: Busch still in front with Gordon and Harvick

• LAP 35: Jarrett has moved up into the 2 spots needed to qualify, along with Carpentier

• LAP 34: Busch still pounded out front, and the speeds are as fast as they've been all day - and a Joe Gibbs sighting on TV

• LAP 31: Still a lot of smoke on the track in the turns - Busch now in the lead with Hamlin 2nd and Gordon 3rd

• LAP 30: Now halfway through, Gordon and Kenseth, with Busch, Hamlin, and Biffle in top 5

• LAP 29: Back to green...finally...time to "CRANK IT UP"...Gordon jumps ahead, with Kenseth close behind

• LAP 28: Now on Red Flag while they try to move a lot of the dust off the track, and now back to yellow - looks like 1 lap until green again

• LAP 27: Some of the drivers have come in during the yellow, and Gilliland now struggling in the pits

• LAP 26: Still under yellow... Top 10: Waltrip, Gordon, Kenseth, Busch, Harvick, Martin, Hamlin, Biffle, Kahne, and Carpentier

• LAP 25: Yellow Flag, smoke coming from Dave Blaney's car...Waltrip will be the leader

• LAP 24: Kenseth and Waltrip battling for the lead, and the sun is a factor on the back stretch

• LAP 23: Schrader and Carpentier would be the 3 cars that get into the 500 as of now

• LAP 22: Back to green... most drivers in the pit took on a change of tires

• LAP 21: Now 1/3 of the race, 1 more lap before green again

• LAP 19: Still under yellow, Kenseth and Kahne come off pit row first, followed by Waltrip, Harvick, and Hamlin. Gordon is 6th, Kyle Busch 8th, Martin 10th, Stewart 12th, and Jarrett 15th.

• LAP 18: Still in clean up mode on the track, still under yellow - Kenseth coming to pit row now that it's open - in fact all the cars are now coming in

• LAP 17: Current Top 5 under yellow: Kenseth, Kahne, Waltrip, Gordon, and Harvick.

• LAP 16: BIG CRASH - Villeneuve and Franchitti among 4 cars involved in the accident, with McMurray and Barrett - Pit road currently closed as they attempt to removed the cars from the track and pit row area...

• LAP 15: Kahne grabs the lead with Kenseth 2nd and Gordon 3rd

• LAP 13: A lot of trading paint (bumper action) near the front as Mark Martin moves into the Top 10

• LAP 11: Others: Dale Jarrett is currently 20th... Kyle Busch 10th... Tony Stewart 17th

• LAP 10: Top 5 so far is Waltrip, Blaney, Kenseth, Kahen and Kvapil with Gordon 6th

• LAP 9: Blaney up to 2nd, and Jeff Gordon is all the way up to 7th from the back of the pack as Burton comes back out with 4 fresh tires

• LAP 7: Burton bringing his car in because, "...it's bouncing..." as Kvapil takes the lead

• LAP 6: Seems like the again drivers, like the first race, are staying on the upper part of the track

• LAP 5: First important marker in the race - Top 5: Waltrip, Blaney, Kvapil, Ragan, Kenseth... with Burton up to 7th and Harvick in 9th

• LAP 3: Jeff Burton moved up 10 spots already - newbies Villeneuve and Carpentier in top 10

• LAP 2: Waltrip will be the leader, followed by Blaney, Kvapil, Ragan, and Kenseth

• LAP 1: Reutimann jumps out in front and he was issued a black flag on the start, so he gets a stop-and-go penalty

• Final warm-up lap as we get ready to go to Green - Here we go!

• Start your engines, part deux.

• Michael Waltrip will be on the pole for the 2nd race, with David Reutimann also on the front row. Others to watch for include: Matt Kenseth 8th, Dale Jarrett 12th, Jeff Gordon starting 24th, and Tony Stewart 25th. Gordon and Stewart are 2 of 3 drivers that needed to move to the back of the field because they needed to replace their engines, Hamlin the other. Franchitti missed the drivers meeting and also goes to rear of field.

• Coming up in a few minutes - history shows that when the 1st of these races is clean with no wrecks and few yellow cautions, the 2nd race tends to be littered with them

• RACE OVER: Dale Earnhardt Jr. wins the first Duel - with Kenny Wallace and Brian Vickers racing their way into Sunday's Daytona 500.

• LAP 59: 1 lap to go, Dale still leading, Wallace and Vickers are getting to get the 2 provisional transfer spots

• LAP 58: Back to green

• LAP 57: Current Top 5: Dale Jr., Sorenson, Newman, Mears, and Kenny Wallace...

• LAP 56: Green flag will come with 3 laps to go - Vickers and many of the "transfer spot drivers" are pitting with 3 laps to go

• LAP 55: 5 laps to go, Dale Jr leads Sorenson, with Wallace and Vickers to two getting in as Sadler goes into the wall and brings out a yellow flag with a blown tire

• LAP 53: Johnson coming to pit row

• LAP 51: Here comes Dale Jr in the 88 to take the lead

• LAP 50: Down the final 10 laps, and Johnson out of Top 10 - Newman leading Sorenson and Dale Jr. running 3rd, looks like Bill Elliott is out

• LAP 48: Vickers in a Toyota up to 5th, Newman leads Sorenson and Dale Jr. with Johnson now down to 8th

• LAP 46: Dale Jr. back up to 5th after dropping as far as 9th... Brian Vickers in 8th

• LAP 45: 3/4 of the race complete, they are still racing hard at green

• LAP 44: Johnson and Newman are 1-2, followed by Montoya, Dale Jr. slipping

• LAP 43: The two provisional spots available right now: it's Brian Vickers (currently 7th) and Sterling Marlin (11th) just ahead of Boris Said (12th)

• LAP 40: 2/3 of the first race over, a close pack at the front with only yellow entire race

• Lead cars averaging 184-190 MPH between Turns 1 & 2... Johnson ahead of Dale Jr. by just 0.128 seconds

• LAP 38: New Top 5 following pits: Johnson, Dale Jr., Newman, Montoya, and Sorenson - all in top 10 are locked in for Sunday

• LAP 37: Riggs out in front now, followed by Mayfield, most of the field back out

• LAP 36: A lot of cars making quick tire changes

• LAP 35: Many of the cars pitting now - Top 5 out is: Menard, Allmendinger, K.Wallace, Riggs, Mayfield

• LAP 32: Still racing at green, and now the strategy of when to pit comes into play

• LAP 31: Some of the cars now hitting pit row in the next few laps - a splash of gas, Boris Said one of them coming in

• LAP 30: Halfway through first race, Vickers coming to pit row again, this time with a tire issue

• LAP 28: Elliot Sadler back on the track with a new tire - they showed the replaced tire which was badly blistered

• LAP 26: Nearing the halfway mark, when the drivers are expected to hit pit row... Dale Jr, followed closely by Newman and Sorenson at front of the pack

• LAP 24: Top 8 cars are either Dodge or Chevrolet

• LAP 22: Elliot Sadler rubs the wall and has a tire issue, coming to pit row, but we're still under green

• LAP 20: 1/3 of the way through and a lot of the drivers are reporting their cars are "real loose" - Top 5: Dale Jr. Newman, Elliot Sadler, Sorenson, Mears

• LAP 19: Dale Earnhradt Jr is in the lead for the first time

• LAP 17: Kurt Busch is out with electrical problems... he will use the Daytona 500 champions provisional on Sunday, so Bill Elliott and Dale Jarrett will have to win these 150s today in order to race Sunday

• LAP 16: Average speeds today are in the 187-190 MPH so far

• LAP 15: 1/4 of the way through, and Truex and Edwards have the lead, Dale Jr. making his move in his new #88 car

• LAP 13: Current Top 5: Edwards, Truex, Dale Jr., Newman, and Bowyer - Nemechek falls to 9th

• Junior up to 6th

• LAP 10: Nemechek in fornt, with Sorenson and Said behind them, Newman 4th

• Kurt Busch fades and slows down - engine trouble... still green

• LAP 9: Cars are still bunched together and two-wide

• LAP 8: Said barely bumps Nemechek

• LAP 6: Newman still holding of Nemechek, Paul Menard moves up to fifth

• Vickers changed 4 tires and getting back onto track as we go back to green

• LAP 4: Yellow caution flag is out, Top 5 currently: Ryan Newman, Joe Nemechek, Kurt Busch, Boris Said, and Martin Truex Jr

• LAP 3: Brian Vickers spins out in Lap Two, they were 3 cars wide, it looks like Said may have caused it

• LAP 2: Nemechek takes lead on first lap at 189 MPH

• LAP 1: Ryan Newman takes the lead, followed by Nemechek, Said, Kenny Wallace, and Vickers

• "Boogity Boogity Boogity - let's go racing boys" - 7 cars move to the rear due to a need to swap engines today

• "Gentlemen, start your engines"...waiting the start...Darrell Waltrip, 1989 Daytona 500 winner and NASCAR on FOX analyst, will wave green flag to get first race started.

• Jimmie Johnson is on the pole, with Joe Nemechek on the first row. All 4 Hendrick cars had to go to the rear of the field because of engine problems.

• Breakdown by cars: 12 Chevrolets, 9 Dodge, 3 Ford, and 3 Toyotas.

• Pre-Race: Weather looks good, but a lot of the drivers are talking about the chilly temperatures. First race about to get underway. First the national anthem and fly-over...