How did they cross the Rocky Mountains?

What are the different heights of grandfather clocks? What is an agricultural estate run by a lord and worked by peasants? Which city was the westernmost? When did humans start using time? Who was the crusades war between? Is Wisconsin on the eastern or western? What is special about the roof of the pantheon? Who invented the first stiletto? What is the meaning of the name Cindy? What is the meaning of the quote He who rejects change is the architect of decay-Harold Wilson? When did Roman crucifixion stop? Which of the following were advanced by trade in the second millennium Select all that apply.? Why did the europeans want all water routes to the orient? What was Jean-Jacques Rousseau's contribution to the Enlightenment during the 17th century? Where did he renaissance begin? What did Narcissa Whitman contribute to the western movement? Which come first the Roman Empire or the Greek Empire? What barbarian group that created a lasting state? What was communication like in the 1400s? What did the knights of the fourth crusade accomplished?

How did they cross the Rocky Mountains?