I am planning on a train trip to Denver in the spring break. The plan is to perhaps leave on Monday from SF and come back before the end of the week...

Its one of the most beautiful train rides in the country, read a little on the Lonely Planet website here - http://www.lonelyplanet.com/usa/california/travel-tips-and-articles/76599

"The California Zephyr from Denver to San Francisco is hands-down the United States’ most spectacular train route, offering unparalleled wilderness scenery as it traverses the country’s two highest mountain ranges. From Denver, the train climbs the pine-covered eastern slopes of the Rockies, then charts a sinuous course through a dazzling series of steep-walled canyons along the Colorado River. Near sunset, the train emerges into the majestic red rock desert of eastern Utah, then crosses overnight into the forbidding vastness of Nevada‘s sagebrush country, with salt flats and stark, arid mountains as far as the eye can see. By noon the next day, you’re climbing into the granite grandeur of California’s Sierra Nevada, where you can stop off in the appealing 19th-century railroad town of Truckee, or continue over Donner Pass into San Francisco."

Its certainly not a trip for everyone, but a travel enthusiast who wants to see the country a little unconventionally...

As for me, I am an exchange student from India on a fellowship here. Little bit about me here - http://www.sid-thewanderer.com/