The Long Road South
The first few days in America have gone well, however Mark continues to battle with the heat as he clocks up the miles. Temperatures have been topping 42 degrees (108F).
Even after reaching the summit of Denali the climbs keep coming and he regularly has to cycle large ascents each day between 3,000' to 6,500' ft, which is roughly 14 times the height of London Eye.
Mark took some time to call in from his camp in North America.
Wait, there's more...
Yesterday afternoon (Wednesday 5 August) Radio 1's Greg James had his regular chat with Mark, and found out if he has managed to master the Spanish lingo.