Very few in the entire Sierra are passable by vehicles.
Using instant potatoes she managed to make a passable potato salad and opened a can of baked beans.
The rapids, or porogs, form a serious obstacle to navigation; it is only for a few weeks when the river is in flood that they are passable, and even then the venture is not without risk and can only be undertaken with the assistance of special pilots.
Broad, and lies at a high level to the east of the Kunar valley, from which it is separated by a continuous line of rugged frontier hills, forming a barrier easily passable at one or two points.
The state owes to this ruler the opening up of new railways across the great desert, which was formerly passable only by camels, and the tapping of the valuable coal deposits that occur in the territory.
North of this saddle the slopes show a slight concavity, but are passable by troops of all arms in close order.
The former difficulties with the Des Moines Rapids of the Mississippi (which are passable for rafts and light boats at high water) have been overcome by a canal from Keokuk to Montrose constructed by the National Government.
The island thus divides the seaward approach to St Petersburg into two channels; that on the northern side is obstructed by shoals which extend across it from Kotlin to Lisynos on the Finnish mainland, and is only passable by vessels drawing less than 15 ft.
It is crossed by several tracks, passable for pack-animals, the most in use being the road between Sawlon, the capital of Gantarawadi and Man Mail.
A causeway of boulders and pebbles, thrown up by the sea and passable at low tide, unites Marazion with the insular St Michael's Mount (q.v.).
For instance, the passes of Kara-kazyk (14,400 ft.) and Tenghiz-bai (11,200 ft.), both passable all the year round, lead from Marghelan to Karateghin and the Pamirs, while Kashgar is reached via Osh and Gulcha, and then over the passes of Terek-davan (12,205 ft.; open all the year round), Taldyk (11,500 ft.), Archat (11,600 ft.), and Shart-davan (14,000 ft.).
These gaps have lately been repaired, or made passable with the help of iron stanchions; the remains cf the buildings at the top and at the foot of the mountain have been excavated; and the entrance to the gallery, between the outstretched paws of a gigantic lion, has been laid bare.
The roads are scarcely passable bridle tracks.
The Mamison Pass, over which runs the Ossetic military road (made passable for vehicles in 1889)from the Terek(below Vladikavkaz) to Kutais in the valley of the Rion, skirting the eastern foot of the Adai-khokh, lies at an altitude of 9270 ft.
This latter route began at Inglis's Ferry, on the New river, in what is now West Virginia, and proceeded west by south to the Cumberland Gap. The " Wilderness Road," as marked by Daniel Boone in 1775, was a mere trail, running from the Watauga settlement in east Tennessee to the Cumberland Gap, and thence by way of what are now Crab Orchard, Danville and Bardstown, to the Falls of the Ohio, and was passable only for men and horses until 1795, when the state made it a wagon road.