We drive to Valle di Gressoney, to the end, to the village Staffal (via Milano, exit Pont St. Martin, approx. 600 km from Trieste). From there we ascend with cable car and chairlift (15 EUR return ticket) to Coll di Bettaforca (2672 m) where our tour starts. First day ascent to Rif. Capanna Sella (3585 m) where we overnight. The ascent follows an unusual path for us, the wall is quite smooth and slippery. During the ascent we cross some snowfields without problems, and before the hut there is an exposed ridge that is unusually secured for us with a plastic rope (hemp). We cross it without problems, a bit of caution is not superfluous. We overnight in the hut, beer is quite expensive (5 euros), water is even worse (1.5 l - 3 EUR, Slovenian hut keepers could learn from this case, it's not worth hauling water up in the backpack for that money), food is also expensive (primo piatto 8 EUR, secondo 15 EUR, breakfast 12 EUR). The hut was crowded, many climbers doing 5-7 day tours on Monte Rosa, reservation recommended in advance. Next day wake-up at 4, start at 5 a.m. Conditions ideal, snow hard and frozen, weather without a cloud, a little wind, temperature below zero. The ascent itself is not technically difficult, to below the summit ridge we cross on a trodden track on the snowy slope (map says it's the Felik glacier), then before the start of the ascent we rope up and a short steep ascent to the ridge follows, then ridge traverse and finally the Castor summit. Ascent time 3 hours. The ridge itself is also not technically demanding, just a bit of caution, and you go up without problems. The altitude causes the most trouble, you get out of breath really quickly and need to rest every 30-50 m of ascent. At the summit the weather is fantastic, sun, temp. around -5 degrees, and views to Gran Paradiso, Mt. Blanc, half of Switzerland, the whole Monte Rosa, etc. Follows a non-problematic descent, beer in the hut and return to the valley. I recommend it to everyone who wants to climb some four-thousander but doesn't have much experience in snow and ice, but is in good physical condition, normally with the accompaniment of a mountain guide or with more experienced high-altitude mountaineers. Pictures coming...