Which preposition to use with intervales

of Occurrences 2%

All day we could see them here and there in the intervales of the forest pushing their way up a steep hill not two miles from the camp, and darkness came before they passed the summit.

between Occurrences 1%

We were riding along a grassy intervale between masses of forest, and he had found the fresh track of a herd of big peccaries crossing from left to right.

toward Occurrences 1%

They passed across the street in this manner, and then went down over the intervales toward the river.

Which preposition to use with  intervales