Sasso di Preguda
|(CH 1903)||E 749190||N 80968||H 615.0|
|(WGS 84)||Long. 9.360||Lat. 45.864|
The Preguda Boulder is comprised of a type of granodiorite, a plutonic igneous rock, called “ghiandone”, whose name is derived from the appearance of large crystals of potassium feldspars (orthoclase), of a form roughly similar to that of acorns. The “ghiandone” emerges extensively in upper Valtellina and was transported there by glaciers which descended the mountain valleys to the south several times during the Quaternary Period. The path to the Preguda Boulder is also punctuated by the presence of several other erratic boulders, located at lower altitudes.
Coming from Milan on the S.S. 36 motorway, take the exit for Valmadrera. Follow Via Roma and then continue on Via Preguda. After a short descent, turn left towards Piazza Rossè and go uphill to the parking area.
Trail number 6 leads to a convenient mule track which climbs up the sides of the south-eastern slope of Moregallo. You will reach the Preguda Boulder in about an hour.