|Home arena||Pepsi Center|
|Based in||Denver, Colorado|
|Colors||Maroon and Black|
|Head coach||Chris Gill
Dan Stroup 
|General manager||Steve Govett|
|Local media||Altitude Sports and Entertainment, KKFN|
|Division Championships||2003, 2004, 2007|
|PLPA representative||Nick Carlson|
In 2004 they became the league's attendance leader, closely beating the Toronto Rock. In 2006, they again came away with the league attendance record, again beating out the Toronto Rock. 2006 was the first year in the 20-year history of the NLL that the league had an attendance of more than one million fans in one season. The Colorado Mammoth had the honor of hosting fan number one million, an honor that commissioner Jim Jennings believed to be rightfully theirs, given the impact they had on the league's attendance that year. In 2008, the Mammoth average attendance per game was highest among Pepsi Center's residents, including the Colorado Avalanche (NHL), and the Denver Nuggets (NBA).
In the 2006 season, the Mammoth went to the playoffs in the #2 seed in the Western Division. Round one was hosted in Colorado against rivals Calgary. The Mammoth won 18-17 in overtime. Brian Langtry scored the overtime goal. Round two (Western Division finals) was also hosted at Pepsi Center against the Arizona Sting. Rookie Dan Carey scored the winning goal as the Mammoth defeated the Sting 13-12. The championship game was held at HSBC Arena in Buffalo against the Bandits who held the league's best record and the incumbent league MVP, goaltender Steve Dietrich . The Mammoth won the Champion's Cup by a score of 16-9, with Gavin Prout being named Game MVP.
- Gary Gait, who retired after the 2005 NLL season as the NLL's all-time scoring leader with 596 goals and 495 assists in 174 games (a record since surpassed by John Tavares). Gait also won the 2003 NLL MVP Award while with the Mammoth. On November 12, 2005, Gait was inducted into the NLL Hall of Fame, and on December 30, 2005, his number 22 jersey banner was hung from Pepsi Center rafters — the first NLL number ever to be retired and hung from any arena. Gait was the Mammoth head coach for the 2006 and 2007 seasons before stepping down in August 2007 to pursue other interests.
- Brian Langtry, who won the NLL Rookie of the Year Award in 2003, is well known for his all-out goal scoring attempts. Langtry retired after the 2011 season.
- Gord "Gee" Nash, who was the 2004 Goaltender of the Year.
- Gavin Prout, a crowd favorite who consistently puts up high numbers. In 2006, Prout was named team captain. On October 31, 2009, to the outrage of many fans, Prout was traded to the Rochester Knighthawks, who in turn traded him to the Edmonton Rush on November 10. After a season and a half in Edmonton, Prout was traded back to the Mammoth in March 2011.
- John Grant Jr., who was the 2012 NLL MVP.
Awards and honors
|2003||Gary Gait||Most Valuable Player|
|Brian Langtry||Rookie of the Year|
|2004||Steve Govett||Executive of the Year|
|Gord Nash||Goaltender of the Year|
|Gary Gait||Sportsmanship Award (tie with Peter Lough)|
|2005||Gary Gait||Sportsmanship Award|
|2006||Gavin Prout||Champion's Cup MVP|
|2012||Adam Jones||Rookie of the Year|
|John Grant, Jr.||Most Valuable Player|
|2014||Joey Cupido||Transition Player of the Year|
NLL Hall of Fame members
Colorado Mammoth roster
|Active (20-man) roster||Inactive roster||Coaches|
|Lost in semifinals|
|2004||Western||13-3||1st||7-1||6-2||223||173||Jamie Batley||Lost in division finals|
|2005||Western||8-8||3rd||5-3||3-5||201||182||Jamie Batley||Lost in division semifinals|
|2006||Western||10-6||2nd||6-2||4-4||200||172||Gary Gait||Won Championship|
|2007||Western||12-4||1st||7-1||5-3||209||179||Gary Gait||Lost in division semifinals|
|2008||Western||9-7||2nd||6-2||3-5||184||167||Bob McMahon||Lost in division semifinals|
|2009||Western||7-9||4th||4-4||3-5||172||184||Bob McMahon||Lost in division semifinals|
|Did not qualify|
|2011||Western||5-11||4th||3-5||2-6||151||172||Bob Hamley||Lost in division semifinals|
|2012||Western||11-5||2nd||5-3||6-2||217||201||Bob Hamley||Lost in division semifinals|
|2013||Western||7-9||4th||3-5||4-4||185||202||Bob Hamley||Lost in division semifinals|
|Lost in division semifinals|
|Lost in division semifinals|
|2003||Quarterfinals||Vancouver 12||Colorado 15|
|Semifinals||Colorado 11||Toronto 15|
|2004||Division Finals||Calgary 13||Colorado 11|
|2005||Division Semifinals||Colorado 13||Arizona 16|
|2006||Division Semifinals||Calgary 17||Colorado 18|
|Division Finals||Arizona 12||Colorado 13|
|Championship||Colorado 16||Buffalo 9|
|2007||Division Semifinals||San Jose 15||Colorado 14 (OT)|
|2008||Division Semifinals||Calgary 15||Colorado 13|
|2009||Division Semifinals||Colorado 8||Calgary 15|
|2011||Division Semifinals||Colorado 6||Calgary 10|
|2012||Division Semifinals||Minnesota 14||Colorado 10|
|2013||Division Semifinals||Colorado 10||Calgary 15|
Head coaching history
Dan Stroup †
† On March 5, 2014 Colorado announced all three would share interim coaching duties after Bob Hamley's firing.  On July 24, 2014 they announced the group would continue to share duties in the 2015 season. 
- "The Mammoth went to a 3 head coach system in 2013".
- "NLL Welcomes Millionth Fan". NLL.com. April 28, 2006. Retrieved 2007-02-13.
- Paton, James (March 21, 2008). "Mammoth Sales". RockyMountainNews.com. Retrieved 2008-03-21.
- "Gait Steps Down as Mammoth Coach". NLL.com. August 22, 2007. Retrieved 2007-08-22.
- "Brian Langtry announces retirement". NLL.com. October 11, 2011. Retrieved 2011-11-05.
- "Prout traded back to Colorado". NLL.com. March 15, 2011. Retrieved 2011-11-05.
|Major Indoor Lacrosse League Champions
New Jersey Saints
|National Lacrosse League Champions