Question: The 2012 Ironman 70.3 World Championship was held in a city with an approximate elevation of what?

Context paragraphs:
Henderson, Nevada: Henderson, officially the City of Henderson, is a city in Clark County, Nevada, United States, about 16 miles southeast of Las Vegas.  It is the second-largest city in Nevada, after Las Vegas, with an estimated population of 292,969 in 2016.  The city is part of the Las Vegas metropolitan area, which spans the entire Las Vegas Valley.  Henderson occupies the southeastern end of the valley, at an elevation of approximately 1330 ft .

2013 Ironman 70.3 World Championship: The 2013 Ironman 70.3 World Championship was a triathlon competition that was held at Lake Las Vegas in Henderson, Nevada on September 8, 2013.  The event was won by German Sebastian Kienle and Australian Melissa Hauschildt.  The championship was organized by the World Triathlon Corporation (WTC) and was the culmination of the Ironman 70.3 series of events that occurred from August 19, 2012 through August 11, 2013.  Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.

2016 Ironman 70.3 World Championship: The 2016 Ironman 70.3 World Championship was a triathlon competition that will be held in Mooloolaba, Queensland, of Australia's Sunshine Coast on September 4, 2016.  It was won by Tim Reed of Australia and Holly Lawrence of Great Britain.  The championship was organized by the World Triathlon Corporation (WTC) and was the culmination of the Ironman 70.3 series of events that occurred from July 19, 2015 through July 3, 2016.  Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.  A prize purse of $250,000 was distributed to the top 10 male and female professional athletes.  The championship location marked the first time the event was be held in the southern hemisphere.

Ironman 70.3: An Ironman 70.3, also known as a Half Ironman, is one of a series of long distance triathlon races organized by the World Triathlon Corporation (WTC).  The "70.3" refers to the total distance in miles (113.0 km) covered in the race, consisting of a 1.2 mi swim, a 56 mi bike ride, and a 13.1 mi run.  Each distance of the swim, bike, and run segments is half the distance of that segment in an Ironman triathlon.  The Ironman 70.3 series culminates each year with a World Championship competition, for which competitors qualify during the 70.3 series in the 12 months prior to the championship race.  In addition to the World Championship race, Ironman 70.3 championship competitions are also held for the European, Asia-Pacific, and Latin America regions.

2011 Ironman 70.3 World Championship: The 2011 Ironman 70.3 World Championship was a triathlon competition that was held at Lake Las Vegas in Henderson, Nevada on September 11, 2011.  It was sponsored by the United States Marine Corps and organized by the World Triathlon Corporation.  The championship race was the culmination of the Ironman 70.3 series of events that occurred from October 1, 2010 to August 15, 2011.  Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.  The 2011 Championship marked the first year that the race was not held in Clearwater, Florida, which had hosted the race since its inception in 2006.

Jeff Symonds: Jeffrey Bruce Symonds (born October 1, 1985) is a Canadian professional triathlete.  He took third-place in the 2011 Ironman 70.3 World Championship.  Symonds' performance made him the first Canadian male and the second man in his twenties (after Terenzo Bozzone) to record a podium finish at the Ironman 70.3 World Championships.  Symonds won the 2015 Ironman Asia-Pacific Championship in Melbourne, and the 2013 and 2014 Challenge Penticton triathlons.

Heather Jackson: Heather Jackson (born April 24, 1984) is an American triathlete and track cyclist.  She is the runner-up of the 2013 Ironman 70.3 World Championship and the third-place finisher at the 2012 Ironman 70.3 World Championship.  In 2009, she took third place in individual pursuit and omnium at the USA Cycling Elite Track National Championships.

2015 Ironman 70.3 World Championship: The 2015 Ironman 70.3 World Championship was a triathlon competition that was held in Zell am See-Kaprun, Austria on August 30, 2015.  It was won by Jan Frodeno of Germany and Daniela Ryf of Switzerland.  The championship was organized by the World Triathlon Corporation (WTC) and was the culmination of the Ironman 70.3 series of events that occurred from August 3, 2014 through July 12, 2015.  Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.  A prize purse of $250,000 will be distributed to the top 10 male and female professional athletes.  The race marked the second year of the championship event being held in a non-recurring location and the first time being held in Europe.

Heather Wurtele: Heather Wurtele (née Danforth, born July 12, 1979) is a Canadian professional triathlete who races long-distance, non-drafting triathlon events.  She has placed second at the 2015 Ironman 70.3 World Championship and third at the 2014 Ironman 70.3 World Championship.

2012 Ironman 70.3 World Championship: The 2012 Ironman 70.3 World Championship was a triathlon competition held at Lake Las Vegas in Henderson, Nevada on September 9, 2012.  The championship was sponsored by the United States Marine Corps and organized by the World Triathlon Corporation (WTC) and was the culmination of the Ironman 70.3 series of events that occurred from August 14, 2011 through August 13, 2012.  Athletes, both professional and amateur, earned a spot in the championship race by qualifying in races throughout the 70.3 series.

Supporting paragraphs: 2012 Ironman 70.3 World Championship Henderson, Nevada
Answer: 1330 ft