Here's an interesting site detailing a trek in progress. A reenacted version of the Mormon Battalion is in route from Nebraska to California. Here's a small write-up from the site:
As the Mexican-American War began in 1846, members of the Church of Jesus Christ of Latter-day Saints were preparing to leave the United States for their journey to the Salt Lake valley.
To aid General Kearny’s campaign to occupy “upper Mexico”, President Polk requested that the Mormons raise a battalion of 500 men to march to California.
Brigham Young and other church leaders were able to convince their people that this was the right thing to do even though it required about 1/4th of the able-bodied men.
The Battalion mustered into service at Council Bluffs, Iowa on July 16, 1846. Including stopovers, the Battalion took 194 days to march approximately 2,000 miles to San Diego. At the time, it was the longest infantry march of US military history.
After a year of service and many adventures, the Battalion was disbanded at Los Angeles, then returned to their families and helped settle the western states.
Sounds like a great time if you don't mind the walking!
Here's a another write-up about it via Wes Clark's site.