Wind River

From BoardGameGeek:

Before the European settlers came to the great plains of North America, the Native Americans lived in harmony with the buffalo herds. In Wind River, you play the head of a tribe, following the buffalo herds across the plains. You want to place your tipis near the buffalo herds to support your tribe, but you have to be able to continually maintain your tribe, which gets harder and harder as the game progresses. As long as there are buffalo near your tipis, there is no problem, but be careful that you don't fall behind the herd migration! At the end of the game, the player with the most tipis that traversed all the way across the plains is the winner.