Carr, who not surprisingly has been taking it easy on the running for the past month, said he ran about 95 miles a week to get ready for the ultramarathon
Petersen says, "You can bank on good GPS coverage in urban settings, but you may run into minor issues in more ultramarathon
terrain, though even in forests they work reasonably well.
race includes 35,000 feet of total elevation gain.
His long list of competitive achievements include winning the world's toughest footrace, the Badwater Ultramarathon
, running 135 miles nonstop across Death Valley during the middle of summer.
After running through rolling hills and dirt roads in the Greek countryside for a little over 33 hours from Friday to Saturday, any kind of celebration would have been warranted for the first Filipino to qualify and conquer the 246-kilometer Spartathlon, one of the toughest ultramarathon
races in the world.
Simon Wheatcroft during a 90-mile ultramarathon
in the Namib desert on May 1 this year.
Paragliders and ultramarathon
races in Italy, France and California and the RedBull XAlps Competition have been early adopters," Mr Field said.
He did complete three marathons as part of last year's fundraising drive - as well as a 45-mile ultramarathon
which included a run to the top of Pen y Fan - but said the pain in his knee, where he had a pin put in after his accident, became too much.
The five-day, 300km Dragon's Back ultramarathon
starts on Monday.
Sir Ranulph, who turns 71 in March, must run 156 miles (251km) across the Sahara in 50C (122F) heat to complete the six-day ultramarathon
The 55–mile Glasgow to Edinburgh Ultramarathon
follows the course of the Forth & Clyde and Union canals, www.
The runner has donated funds raised in the Hardmoors 110 Ultramarathon
to Overgate Hospice.