The fortified settlement of Monte Caslè was identified in 1883 by Vincenzo Barelli and the American scholar James B. Andrews. In 1906 it was excavated by Antonio Magni and E. Berta who discovered an imposing dry stone wall and square hut bottoms, with sides of circa 4m, bounded by smaller scale dry stone walls, preserved to a height of circa 40cm.
Three trenches were dug on the Mount during World War I and later it underwent large scale reforestation and planting of conifers. Excavations were undertaken by the Soprintendenza in 1952 (Nevio Grassi) and in 1986 by the Archaeological Museum of Como.
The research by Como Museum began again in 2004, with the concession of the Ministero per I Beni e le Attività Culturali.
At present the research project foresees the re-systematization of the plant cover, planimetric survey, stratigraphic excavation with the analysis of the finds, consolidation of the remains found and the planning of a visitors route for the public.

The first two excavation campaigns uncovered as much of the defensive wall as possible (visible for a length of over 50m) and the perimeter of the archaeological area was established. A large amount of pottery emerged both from deposits of dumped material and at various points in the wall, which perhaps attests the continuous rebuilding of the dry stone structure.
In the area of the pond, which had dried up due to climactic and geomorphological changes and constituted an archive of the history of vegetation in the valley, boring was undertaken to check the archaeology and core samples were taken for ecological research (vegetal remains, macroscopic carbonised wood, pollen, diatoms etc). (Marina Uboldi, Roberto Caimi)