FREMONT COUNTY, Colo. (CBS4)– Fire crews are battling a wildfire burning in Fremont County.

The North Millsap Fire grew to 22 acres overnight Friday into Saturday. Lightning caused the fire about five miles north of Canon City.

READ MORE: Denver Mayor Michael Hancock Joins Other Mayors Asking Biden To Be Included In Climate Migration Study

The North Milsap Fire burning in Fremont County (credit: CBS)

Fire officials reported the fire was 20% contained as of Saturday night.

BLM Colorado Fire has multiple crews attacking the fire which is burning in rugged terrain in Ponderosa Pine and Gamble Oak.

A helicopter is making water drops on the fire.

The North Milsap Fire burning in Fremont County (credit: CBS)

Smoke may be visible throughout the day in Fremont and Teller County due to hot, dry and windy conditions.

READ MORE: Denver Weather: Snow Season Jumps Into Top 10

The fire is not threatening structures.

Wildfire Resources

– Visit CBSDenver.com’s Living With Wildfire section.

Wildfire Photo Galleries

MORE NEWS: Newest Police Accountability Bill Moves Forward In Colorado, Focuses On De-Escalation And Use Of Force

– See images from the most destructive wildfires (Black Forest, Waldo Canyon, High Park and Fourmile) and largest wildfire (Hayman) in Colorado history.