Along the ridge of Mount Subasio stand some isolated peaks among which the most important are, from north to south, Mount Subasio (1290 m), Mount Civitelle (1280 m) and La Sermolla (1191 m). Also standing out at the northwestern tip is the hill of San Rufino (1110 m) and to the southeast of the relief, la Madonna di Spella (978 m); further south, separated from the Fosso Renaro valley, there is Mount Pietrolungo (914 m).
The characteristically rounded shape and the towns of Assisi and Spello which stretch along the slopes, make Mount Subasio easily identifiable in the panorama of the Umbrian plain.
Mount Subasio separates and connects as a natural frame, the historic towns of Assisi, Spello, Nocera Umbra and Valtopina, a unifying element of the landscape.
The top of the mount is plain and shows the Karst phenomena (which owes its existence basically to the solvent action of water on rocks) and contrasts with the steep slopes above the eastern part.
The slopes of Subasio are covered by major trees that stand out in three groups: the first one is characterized by the cultivation of which extends from Assisi to Spello on one side and on the other from Costa di Trex to Armenzano and San Giovanni; the second natural arboreal vegetation of Turkey Oak and Bay Oak, Black Hornbeam, Flowering Ash, Maple and Beech and Holm Oak; high forests of resinous plants, due to reforestation, characterize the third band together with peak grasses for grazing meadows.
The remarkable variety of natural environments does not host a poor fauna even if hunting has been banned for decades in the vast state-owned area of ​​the relief: the wolf is occasionally reported, there was evidence of the settlement of the golden eagle until the ’60s, as well as the rock partridge.
The current management of the mountain favors the new colonization of the partridge, the wild cat, the squirrel, the wood pigeon, the magpie, the jay, the porcupine, the badger, the fox, the weasel, the stone marten and the wild bear.
Among the birds of prey, especially on the eastern side, there are the buzzard, the goshawk, the horned owl.
(Source: parco del monte subasio – link: www.parks.it/parco.monte.subasio/index.php)