For an unforgettable frontier experience, nothing beats a weekend getaway to Platte River Fort, a working cattle and guest ranch with some serious Western flair. Platte River Fort is open for visitors year-round, but our favorite time to visit is in the fall, when Colorado history comes alive right before your eyes on "roundup" weekends. During roundups, guests hop onto ATVs and follow cowboys and girls as they herd dozens of longhorn cattle on the 235-acre property. After the roundup, learn to use a lasso, try skeet shooting and archery, pet an alpaca, and visit the resident bull. There's always plenty of good down-home cooking prepared in an on-site gourmet kitchen. For overnight guests, we highly recommend hunkering down in the covered wagon.