Skis
A crevice.
A long narrow region of land with water on each side is called and isthmus
Very narrow but a little over 1 foot long.
Fjords.
A long narrow chain of hills and mountains is called a mountain range or a mountain chain.
a LONG NARROW CUT IS CALLED A SLIT. IT MEANS A LONG ROAD SPLIT IN 2.
fjord fjord
That could be cross country skis.
Foot. It was a series of stops. Not a real train.
ria
3 months
By foot 4-6 months