In 2010, I 'had a look' at the continuation of the route to Gondo, which is just short of the Italian frontier & the end of the Simplon Pass proper but did not get very far. However, here is some 'need to know' information. On the Kummerly & Frey map, a high-level footpath is shown from the southerly road into the Simplon Hospiz (which is set back from the main road) which should lead to Gondo. This path is badly way-marked & keeps disappearing. I tried to follow it but eventually, gave up & dropped down onto the filled-in glacier lake above Simplon Dorf (dorf = village), left-hand slide below. I crossed the main road & rejoined the Stockalperweg by walking South down the avalanche shed until a side road allowed me to cross to the Stockalperweg, then made my way up to the pass again.

The filled-in lake above Simplon Dorf

On the Stockalperweg

The Stockalperweg from the pass

The Stockalperweg is a good pack-horse track on this side, too, as can be seen on the middle slide above. The right-hand slide is from behind the pink Restaurant Monte Leone, which is opposite the Simplon Hospiz. Now, be warned. The upper part of the Stockalperweg in quiet or silent but after a few miles going down, the modern road is quite noisy, especially where the sound is amplified by the avalanche sheds, of which there are many.