<P> In 1979, four categories was considered not enough, and another category was added . Instead of adding a fifth category, the Tour organisation decided to add a hors catégorie . </P> <P> The following climbs used in the Tour de France have been ranked "Hors catégorie" at least once . </P> <Table> <Tr> <Th> Col </Th> <Th> Height (m .) </Th> <Th> No. of times visited </Th> <Th> No. of HC climbs </Th> <Th> First time as HC climb </Th> <Th> Most recent </Th> <Th> Profile </Th> <Th> Notes </Th> </Tr> <Tr> <Td> Col Agnel </Td> <Td> 2744 </Td> <Td> </Td> <Td> </Td> <Td> 2008 </Td> <Td> 2011 </Td> <Td> (1) </Td> <Td> The first appearance of the climb in 2008 wasn't planned initially, as the stage was designed to go through the Maddalena Pass . Due to a seismic risk on the pass, the route was changed three months before the start of the race and the Col Agnel was included . </Td> </Tr> <Tr> <Td> Alpe d'Huez </Td> <Td> 1850 / 1860 </Td> <Td> 30 </Td> <Td> 26 </Td> <Td> 1979 </Td> <Td> 2018 </Td> <Td> (2) </Td> <Td> In 2013, the Alpe was visited twice on Stage 18, firstly crossing below the summit at 1765m before returning as the stage finish at the summit (1850m). </Td> </Tr> <Tr> <Td> Andorra Arcalis </Td> <Td> 2240 </Td> <Td> </Td> <Td> </Td> <Td> 1997 </Td> <Td> 2016 </Td> <Td> (3) </Td> <Td> </Td> </Tr> <Tr> <Td> Annecy - Semnoz </Td> <Td> 1655 </Td> <Td> </Td> <Td> </Td> <Td> 2013 </Td> <Td> 2013 </Td> <Td> (4) </Td> <Td> In 1998, the Semnoz (known as Crêt de Châtillon) was part of the route and was a 1st category climb . However, during the stage, racers went on strike to protest against the excessive police measures . The stage, although fully completed, was declared void . </Td> </Tr> <Tr> <Td> Col d'Aubisque </Td> <Td> 1709 </Td> <Td> 48 </Td> <Td> 14 </Td> <Td> 1980 </Td> <Td> 2012 </Td> <Td> (5) </Td> <Td> No. of times visited includes stage finishes at Gourette </Td> </Tr> <Tr> <Td> Port de Balès </Td> <Td> 1755 </Td> <Td> 5 </Td> <Td> 5 </Td> <Td> 2007 </Td> <Td> 2017 </Td> <Td> (6) </Td> <Td> </Td> </Tr> <Tr> <Td> Plateau de Beille </Td> <Td> 1780 </Td> <Td> 6 </Td> <Td> 6 </Td> <Td> 1998 </Td> <Td> 2015 </Td> <Td> (7) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de la Bonette </Td> <Td> 2715 / 2802 </Td> <Td> </Td> <Td> </Td> <Td> 1993 </Td> <Td> 2008 </Td> <Td> (8) </Td> <Td> Highest Hors Catégorie climb to date . </Td> </Tr> <Tr> <Td> Chamrousse </Td> <Td> 1730 </Td> <Td> </Td> <Td> </Td> <Td> 2001 </Td> <Td> 2014 </Td> <Td> (9) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de la Croix - de-Fer </Td> <Td> 2067 </Td> <Td> 19 </Td> <Td> 11 </Td> <Td> 1989 </Td> <Td> 2017 </Td> <Td> (10) </Td> <Td> Shares the same slopes from the col du Glandon on two sides . </Td> </Tr> <Tr> <Td> Col du Galibier </Td> <Td> 2556 / 2645 </Td> <Td> 57 </Td> <Td> 20 </Td> <Td> 1979 </Td> <Td> 2017 </Td> <Td> (11) </Td> <Td> Highest stage finish in the history of the Tour de France . In 2015, the climb was scheduled to be used, but ultimately wasn't due to landslides . The Col de la Croix de Fer was used instead . </Td> </Tr> <Tr> <Td> Col du Glandon </Td> <Td> 1924 </Td> <Td> 13 </Td> <Td> 5 </Td> <Td> 1981 </Td> <Td> 2015 </Td> <Td> (12) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Grand Colombier </Td> <Td> 1501 </Td> <Td> </Td> <Td> </Td> <Td> 2012 </Td> <Td> 2017 </Td> <Td> (13) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Grand Saint - Bernard </Td> <Td> 2465 </Td> <Td> 5 </Td> <Td> </Td> <Td> 2009 </Td> <Td> 2009 </Td> <Td> (14) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Granon </Td> <Td> 2413 </Td> <Td> </Td> <Td> </Td> <Td> 1986 </Td> <Td> 1986 </Td> <Td> (15) </Td> <Td> </Td> </Tr> <Tr> <Td> Hautacam </Td> <Td> 1560 </Td> <Td> 5 </Td> <Td> 5 </Td> <Td> 1994 </Td> <Td> 2014 </Td> <Td> (16) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de l'Iseran </Td> <Td> 2770 </Td> <Td> 5 </Td> <Td> </Td> <Td> 1992 </Td> <Td> 2007 </Td> <Td> (17) </Td> <Td> </Td> </Tr> <Tr> <Td> Isola 2000 </Td> <Td> 1900 </Td> <Td> </Td> <Td> </Td> <Td> 1993 </Td> <Td> 1993 </Td> <Td> (18) </Td> <Td> </Td> </Tr> <Tr> <Td> Col d'Izoard </Td> <Td> 2360 </Td> <Td> 34 </Td> <Td> 8 </Td> <Td> 1986 </Td> <Td> 2017 </Td> <Td> (19) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de Joux - Plane </Td> <Td> 1691 </Td> <Td> 12 </Td> <Td> 7 </Td> <Td> 1981 </Td> <Td> 2016 </Td> <Td> (20) </Td> <Td> </Td> </Tr> <Tr> <Td> La Plagne </Td> <Td> 1980 </Td> <Td> </Td> <Td> </Td> <Td> 1984 </Td> <Td> 2002 </Td> <Td> (21) </Td> <Td> </Td> </Tr> <Tr> <Td> Port de Larrau </Td> <Td> 1573 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 2007 </Td> <Td> (22) </Td> <Td> </Td> </Tr> <Tr> <Td> La Ruchère - en - Chartreuse </Td> <Td> 1160 </Td> <Td> </Td> <Td> </Td> <Td> 1984 </Td> <Td> 1984 </Td> <Td> (23) </Td> <Td> Lowest Hors Catégorie climb to date . </Td> </Tr> <Tr> <Td> Col de la Lombarde </Td> <Td> 2351 </Td> <Td> </Td> <Td> </Td> <Td> 2008 </Td> <Td> 2008 </Td> <Td> (24) </Td> <Td> </Td> </Tr> <Tr> <Td> Luz Ardiden </Td> <Td> 1715 </Td> <Td> 8 </Td> <Td> 8 </Td> <Td> 1985 </Td> <Td> 2011 </Td> <Td> (25) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de la Madeleine </Td> <Td> 1993 </Td> <Td> 25 </Td> <Td> 17 </Td> <Td> 1980 </Td> <Td> 2013 </Td> <Td> (26) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Mont - Cenis </Td> <Td> 2083 </Td> <Td> 5 </Td> <Td> </Td> <Td> 1999 </Td> <Td> 1999 </Td> <Td> (27) </Td> <Td> </Td> </Tr> <Tr> <Td> Port de Pailhères </Td> <Td> 2001 </Td> <Td> 5 </Td> <Td> </Td> <Td> 2005 </Td> <Td> 2013 </Td> <Td> (28) </Td> <Td> </Td> </Tr> <Tr> <Td> Pla d'Adet </Td> <Td> 1669 </Td> <Td> 10 </Td> <Td> 5 </Td> <Td> 1981 </Td> <Td> 2014 </Td> <Td> (29) </Td> <Td> 1982 Tour de France finish was planned to end at the Col de Portet, but was ultimately cancelled and the finish line was moved back to Pla d'Adet . </Td> </Tr> <Tr> <Td> Puy de Dôme </Td> <Td> 1415 </Td> <Td> 13 </Td> <Td> </Td> <Td> </Td> <Td> 1986 </Td> <Td> (30) </Td> <Td> Only climb in the Massif Central to have received the Hors Catégorie rating </Td> </Tr> <Tr> <Td> Col du Soudet </Td> <Td> 1540 </Td> <Td> 6 </Td> <Td> </Td> <Td> </Td> <Td> 2006 </Td> <Td> (31) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Soulor </Td> <Td> 1474 </Td> <Td> 22 </Td> <Td> </Td> <Td> 1982 </Td> <Td> 1982 </Td> <Td> (32) </Td> <Td> Usually climbed while descending the col d'Aubisque from its west side . </Td> </Tr> <Tr> <Td> Superbagnères </Td> <Td> 1770 </Td> <Td> 6 </Td> <Td> </Td> <Td> 1986 </Td> <Td> 1986 </Td> <Td> (33) </Td> <Td> </Td> </Tr> <Tr> <Td> Col du Tourmalet </Td> <Td> 2115 </Td> <Td> 88 </Td> <Td> 26 </Td> <Td> 1980 </Td> <Td> 2016 </Td> <Td> (34) </Td> <Td> No. of times visited includes stage finishes at La Mongie . </Td> </Tr> <Tr> <Td> Val Thorens </Td> <Td> 2275 </Td> <Td> </Td> <Td> </Td> <Td> 1994 </Td> <Td> 1994 </Td> <Td> (35) </Td> <Td> </Td> </Tr> <Tr> <Td> Mont Ventoux </Td> <Td> 1909 </Td> <Td> 16 </Td> <Td> 7 </Td> <Td> </Td> <Td> 2016 </Td> <Td> (36) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de la Pierre St Martin </Td> <Td> 1610 </Td> <Td> </Td> <Td> </Td> <Td> 2015 </Td> <Td> 2015 </Td> <Td> (37) </Td> <Td> </Td> </Tr> <Tr> <Td> Finhaut - Emosson </Td> <Td> 1960 </Td> <Td> </Td> <Td> </Td> <Td> 2016 </Td> <Td> 2016 </Td> <Td> (38) </Td> <Td> </Td> </Tr> <Tr> <Td> Montee de Bisanne </Td> <Td> 1723 </Td> <Td> </Td> <Td> </Td> <Td> 2016 </Td> <Td> 2016 </Td> <Td> (39) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de la Biche </Td> <Td> 1316 </Td> <Td> </Td> <Td> </Td> <Td> 2017 </Td> <Td> 2017 </Td> <Td> (40) </Td> <Td> </Td> </Tr> <Tr> <Td> Mont du Chat </Td> <Td> 1504 </Td> <Td> </Td> <Td> </Td> <Td> 2017 </Td> <Td> 2017 </Td> <Td> (41) </Td> <Td> </Td> </Tr> <Tr> <Td> Col de Portet </Td> <Td> 2215 </Td> <Td> </Td> <Td> </Td> <Td> 2018 </Td> <Td> 2018 </Td> <Td> (42) </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Col </Th> <Th> Height (m .) </Th> <Th> No. of times visited </Th> <Th> No. of HC climbs </Th> <Th> First time as HC climb </Th> <Th> Most recent </Th> <Th> Profile </Th> <Th> Notes </Th> </Tr>

What is the steepest climb in the tour de france