Le Mormont is a hill in the Swiss canton of Vaud, rising to an altitude of 604 metres, or a prominence of about 160 metres. It is part of the Éclépens municipality. The name is first recorded in AD 814, as Mauromonte. It is derived from the Roman-era personal name Maurus.
Le Mormont is about halfway between lakes Neuchatel and Geneva, forming a watershed between the Rhine and the Rhone basins, separating the Venoge and the Orbe valleys to the south and north, respectively. East of Le Mormont runs the Entreroches gorge, through which the Canal d'Entreroches was dug in the 17th century, enabling water transportation between the Rhone and the Rhine rivers. The canal ceased to be profitable in the 18th century, and when a bridge across the canal collapsed in 1829, it was shut down altogether. The course of the historical canal is now traversed by a railway tunnel of the Lausanne-Yverdon line.
Le Mormont has been substantially mined for chalk used in cement production. It
was planned to extend the mining pit to the hill's summit in 2006
to 2009; because of this, the cantonal archaeological office of
Vaud performed a watching brief excavation, which led to the
discovery of a late La Tène period (c. 100 BC) Helvetic cult
site. The site was reported as being of unprecedented size and
richness for the period. A total of 250 pits containing sacrificial
deposits were recorded. Among the deposited goods were ceramic and
bronze vessels, iron tools, jewelry, grinding stones, coins, and
both animal and human remains. It is unclear whether the human
remains represent a cemetery or evidence of human sacrifice. The
site is of primary importance for Gaulish religion on the eve
of the Roman conquest. Because of the importance of the
archaeological site, the mining operation has been put on hold
until a more detailed archaeological excavation scheduled for
2014/15.