Approach

From the MB tunnel take the old road past Courmayeur and St Didier to Morgex.  From Morgex take the road across the river direction La Thuile via the Col San Carlo, (often kept open in winter despite its 1951m,) After a lot of hairpins you arrive at the little hamlet of Arpy 1670m,  Turn off into the village where there is parking near the Nordic ski centre, (cafe).

Ascent

From Arpy 1670m follow the Nordic ski piste to the end of Arpy meadows 1760m and using a little bridge take the forest track on the true right bank of the river leading up towards the Arpy lake, (summer footpath with red and white markings on the trees.)  At about 1850m cross to the true left bank and join the forest road coming in from the San Carlo col. This leads up to the Arpy lake.  From the lake go towards the Col de la Croix, (footpath signposts) and before reaching this col, go to the right to the Point de la Croix (2478).

Descent

By the same route but with lots of possibilities as far as the Arpy lake.  After the lake there is a small steep section to traverse.
It is also possible to continue NE from the summit to find a way into a nice slope leading down to where the Col San Carlo road meets the ascent path.  Steeper skiing than the ascent route option.