been largely completed. The era of sports climbing had begun and innumerable climbing routes in all possible difficulty rates were traced on the vertical walls of these mountains over the years. Via delle Bocchette The access to the peaks and pinnacles of the central part of the Brenta Group was facilitated by the construction -by order of the SAT- of a via ferrata that would respectfully avoid the summits but would connect the passes and indentures called bocchette between the peaks. The work on the Via dell Bocchette Centrali started in 1935. Much of the work at that stage was done by the Brenta guides of that era: Bruno Detassis and Enrico Giordano. The itinerary completed two years later enabled climbers to reach the apex of the Campanile Basso Via Normale. The works were interrupted by the Second World War but were resumed in 1948 mostly by effort of Celestino Donini, until reaching its completion point at the Bocca dei Armi. Later, in 1968-'69 the itinerary was extended towards the Bocca del Tuckett by a trajectory called Via delle Bocchette Alte, a challenging itinerary that reaches a quota of 3002 meters and traverses the Cima Brenta east face just under the summit. At a later stage the itinerary of vie ferrate was extended towards Passo del Grostè by means of the Sentiero Benini and still later on extended further over the Northern Chain towards Rifugio Peller: Sentiero Costanzi. Flora and fauna The Autonomous Province of Trento passed a law in 1967 to protect the Brenta Group as part of the Parco Naturale Adamello-Brenta. This area covers 650 km2. Its fauna is among the richest of the Alps and includes all animal species which find their habitat on the mountains; bear, chamois and alpine ibex included. The Brenta Group was one of the last places in Italy where endemic bears (Ursus arctos) could find a habitat. Their numbers have recently grown, also as a result of the strengthening of the population by mixing in bears from Slovenia. Approximately 30 bears populate the park. The golden eagle (Aquila chrysaetos) and the wood grouse (Tetrao urogallus) find a protected home in these mountains. At several locations there are colonies of alpine marmots (Marmota marmot). Skiing, hiking and climbing The ski slopes are located on the west side of the Brenta Group in Val Rendena surrounding the ski resorts of Madonna di Campiglio and