Among many daring climbs in the Canadian Rockies, few have been more sensational than the successful ascent of Pinnacle Mountain, on the eastern side of Paradise Valley, by J. W. A. Hickson in 1909. The following is borrowed from Mr. Hickson's spirited account of the climb in the _Canadian Alpine Journal_, 1910. Several determined efforts had been made to capture the peak during the summer of 1907, but the season was unfavourable for mountaineering, and in every case the climbers were driven back. The critical point was at the foot of an almost vertical tower, a few hundred feet below the summit, but only two possible means of surmounting this final wall presented themselves. One was by way of a chimney or crack in the wall, and the other in traversing the face of the mountain along an extremely narrow ledge of peculiarly rotten rock. The first had been tried unsuccessfully in 1907. The latter formed the route of the 1909 expedition. Mr. Hickson was accompanied by two Swiss guides, Edouard Fuez, Jr., and Rudolf Aemmer. "It was realised," says Mr. Hickson, "that only very slow progress could be made in this direction, for the disintegrated tawny-coloured limestone rock was of a most treacherous character. It was covered for the most part with a glaze of ice, which when disturbed had a tendency to bring the eroded limestone away with it. It was hard to say whether the rock sustained the ice or vice versa; perhaps the support, such as it was, was mutual. "In our attempt to turn a sharp angle I found myself sitting for about ten minutes--but for what seemed more like half an hour--astride a rocky protuberance, which appeared likely to give way at any moment, while Fuez was endeavouring to find a good footing on the other side. For a few minutes I almost regretted that I had come; for there was a sheer drop on either side of probably 2,000 feet. At many places there were no handholds; and we dared not touch the rocks with our ice-axes lest we should precipitate downwards the insecure supports we were standing on. We were very much in the position of flies on a nearly vertical wall covered with sand which from time to time was crumbling off. There was no defined ledge to follow. "Advancing gingerly with cat-like tread, and avoiding any spring or jerk which might detach the insecure footholds and leave us hanging precariously, Fuez picked out places here and there which offered the chance of a support, and we were glad when we found a piece of rock an inch or two wide and a few inches long on a part of which a nailed boot-edge could obtain a transitory grip. It is remarkable how very small a projection, if not slippery, will suffice for a temporary hold. Fortunately not one of the party once slipped; thus avoiding any test as to how far he could have been held by the others. Luckily, also, we had lots of rope, so that we could allow about twenty-five feet between each person, and thus enabled us at times to manoeuvre into better positions.