 An immensely strong walker, amongst his climbs were the first ascent of Monte Rosa in 1855, the first official ascent of Mont Blanc du Tacul in 1855, the first completed passage of the Mönchjoch in 1858, the first ascent of Mont Blanc by the Goûter route (incomplete) in 1859 with E. S. Kennedy and party, and the second ascent of the Aiguille Verte (the first by the Moine ridge) in 1865 (with T. S. Kennedy and Michel Croz).He is also considered a pioneer of English guideless climbing in the western Alps, having made the first guideless ascent of Mont Blanc in 1855 and a guideless ascent of the Breithorn.During the first ascent of the Matterhorn on 14 July 1865 Hudson was killed in a notorious accident during the descent.