Ben Nelson, a professional photographer at Envision Studio in Boulder, Colorado, took these photos as the Calwood Fire was spreading toward Highway 36 northwest of Boulder.
You can follow Ben on Instagram: @_bennelson and @envisionstudio
and on Twitter: @envisionBen
The Calwood Fire has burned 8,700 acres and destroyed over 20 homes.
To see all articles on Wildfire Today about the Calwood Fire including the most recent, click here.