Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013Start of the Ultra Trail du Mont Blanc (UTMB) 2013