Translation of "Hikes" in Japanese

Was going on these late night hikes.

夜遅くにハイキングに行くことです

Autumn is the best season for going on hikes.

ハイキングは秋に限る。

The union bosses are fighting the freeze on wage hikes.

労働組合の幹部は賃上げの凍結に反対して、闘っています。