The Black Hawk War of 1867 between the settlers and the local Indians left Glenwood deserted for one year, but it was later resettled in 1868 after peace resumed.

Glenwood was an excellent site for a settlement, owing to fresh springs that naturally bubbled from the hills east of town.

A ZCMI co-operative building was built at the intersection of Main and Center streets in 1878.

As families moved out of Glenwood, Isaac Washington Pierce Jr., a resident of Glenwood, bought out all shares in the store and ran the store as a privately owned business for many years.([5]).

According to the United States Census Bureau, the town has a total area of 0.5 square mile (1.4 km2), all land.

The Mill Canyon-Sage Flat Watershed Project located in the drainage above Glenwood is designed to reduce flood damage in the area.

Completed in 1959, this was the first project in the United States under the Watershed Protection and Flood Prevention Act.