Departure from Moraine Lake, accessible from Lake Louise. Parking in the large car park at the end of the road, just before the lake.
(S/E) Pass the spillway, follow the lake on your left and pass a bar-restaurant on your right.
(1) After about 200 metres, at a junction, turn right onto the Larch Valley Trail and Effeil Lake/Wenckchemna Pass (sign). Cross a stream on a wooden footbridge and climb west-southwest into the forest. Then follow several very regular switchbacks and reach a junction in the forest (bench, signpost).
(2) Take the left-hand path towards Eiffel Lake and Wenckchemna Pass. Heading generally west, this path is slightly downhill. With superb views of the Ten Peaks on your left, it starts in the forest, crosses flower-filled meadows (in season) and ends in rocky terrain. You will reach an area of small boulders well above Eiffel Lake, with a few trees.
(3) Continue west. Then turn left (southwest then south), losing a little altitude to cross a stream.
(4) Turn right (west) and begin the climb to the pass on a trail in the scree. Make several switchbacks on a steep slope and, depending on the season, cross one or two snowfields. Finally reach the pass (sign).
(5) The descent is via the same route to Moraine Lake (S/E).