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Imagine the campus without Varsity Lake — just a deep, muddy ravine channeling snowmelt down the hill.

A 1907 photo of students at CU Boulder.

A brief history of the CU Boulder hiking club.

In 1956 CU Days became Sea U Days and had a maritime theme.

In September 1934 the women’s dormitory, now Sewall Hall, opened and is considered by many to be campus architect Charles Klauder’s masterpiece.

During John Wesley Powell’s epic western adventures during the late 1860s and early 1870s, including a pioneering float trip down the Colorado River, he collected Native American blankets.

The university’s first football team took to the field undisciplined and without a coach. The 1890 flannel-clad sportsmen lost every game.

The Old Main bell joined a cacophony of bells tolling 150 times on Feb. 10, 2009, in celebration of Boulder’s sesquicentennial anniversary.

During World War II the campus was filled with coeds and military personnel.

When Lelia Hinkley arrived in Peking, China, in 1921, she was greeted by a famine that placed nearly 20 million Chinese teetering on the brink of starvation.