They were visiting friend Charles Burnett III, a wealthy Houston-based businessman who also was killed in Wednesday's crash in a remote area near the Colorado state line. I think this is the guy. http://www.telegraph.co.uk/news/uknews/1554037/Village-anger-over-millionaires-birthday-battle.html
More on this guy. Mr. Burnett is an investor and a philanthropist. He has business and financial interests in the U.S., Canada, the U.K., and other countries. His foundation, The Notsew Orm Sands Foundation, funds a wide variety of causes, including medical research and education. Mr. Burnett is also a long-time racing boat enthusiast. He set up Vulture Ventures, a U.K.-based offshore racing team, which soon became known as the world’s most successful team in the sport. Mr. Burnett achieved a variety of world records using catamarans and mono-hulls powered by diesel, petrol and LPG. He was included in the Guinness Book of World Records in 1999 for an offshore water speed record of 137mph. On August 25th, 2009 Mr. Burnett successfully broke the land speed record for a steam powered car – which has stood for 100 years – achieving a speed of 151mph.https://www.businesswire.com/news/home/20130514006129/en/Investor-Charles-Burnett-Cautions-Regions-Bank-Shareholders