Tinderbox conditions have set the stage for a number of brush fires on the Front Range and Eastern Plains, with evacuations ordered for a number of homes. 

Residents near Pikes Peak International Speedway were ordered to evacuate at around 1:30 p.m. Saturday. Those evacuation orders were lifted just after 5 p.m.

Earlier Saturday morning, a wildfire sparked on Mount Muscoco in Colorado Springs, forcing closures at North Cheyenne Canyon Park and Helen Hunt Falls. 

The blaze, dubbed the Four Corners Fire, was first reported at around 6 a.m., according to a tweet from the Colorado Springs Fire Department.

“Firefighters have hiked into the area. Estimating the fire is less than one acre but in steep and rocky terrain. Helicopter should be on scene within 15 minutes to do water bucket drops to assist crews with putting the fire out,” the department said in a tweet at 9:24 a.m. on Saturday. 

At the time of publication, no evacuations had been ordered. 

Earlier this week, a grass fire that started north of Boulder near Lake Ridge Trail Thursday, grew to 20 acres as of 3 p.m. Saturday.

The Boulder County Sheriff’s Office said the fire was 100% contained Thursday. An evacuation warning was issued for the Lakeridge Trail and Nelson Road areas, but no structures have burned.

Multiple Red Flag Warnings have been issued across the state by the National Weather Service (NWS), ahead of dry and windy conditions expected in some areas. The Front Range Foothills and portions of the Northeast Plains are included in the warning. 

“A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior,” the service said.

NWS said Saturday that Red Flag Warnings will continue Sunday morning until relief comes in the afternoon with a 30% chance of showers. Meanwhile the forecast for the mountains on Sunday calls for snow.

(Tamera Twitty, Kyla Pearce AND 9News contributed to this story.)