These are the top 20 largest wildfires in Colorado history, including grassland fires (of course, the ranking could change if the 416 Fire grows).

1. Hayman – 138,114 acres, 2002
2. West Fork Complex (West Fork, Windy Pass and Papoose fires) – 109,632 acres, 2013
3. High Park Fire – 87,250 acres, 2012
4. Missionary Ridge – 71,739 acres, 2002
5. Last Chance Fire – 52,000 acres (grassland), 2012
6. Bridger Fire – 45,800 acres, 2008
7. Bear Springs/Callie Marie Fires – 44,662 acres, 2011
8. 117 Fire – 42,795 acres (grassland/brush), 2018
9. Beaver Creek Fire – 38,380 acres, 2016
10. Badger Hole Fire – 33,609 acres in Colorado (grassland; 50,858 acres overall, with remainder in Kansas), 2018
11. Burn Canyon Fire – 31,300 acres, 2002
12. Mount Zirkel Complex - 31,016 acres, 2002
13. Trinidad Complex (Spring, Fisher/James John fires) – 25,919 acres in Colorado (33,000 acres overall, with remainder in New Mexico), 2002
14. Mayberry Fire – 25,385 acres, 2002
15. Little Sand Fire – 24,900 acres, 2012
16. Heartstrong Fire – 24,000 acres (grassland), 2012
17. Bircher Fire – 23,607 acres, 2000
18. 416 Fire -- 23,378 acres, 2018
19. Waldo Canyon Fire – 18,247 acres, 2012
20. Big Fish Fire – 17,056 acres, 2002
21. Cheyenne County Fire (Was No. 20 before this week) – 15,000 acres (grassland), 2002