FOREST, AZ (3TV/CBS 5) - The Bighorn Fire burning in the Santa Catalina Mountains near Tucson is at 104,690 acres with 45% containment. On June 5, 2020 at 10:22PM a lightning strike started the Bighorn Fire in the Catalina Mountains northwest of Tucson, Arizona on the Coronado National Forest. The Santa Catalina Mountains, or the Catalinas, is just north of Tucson and is the most widely-known mountain range in the area. High temperatures … Across the rest of the state, the Bighorn Fire has burned nearly 16,000 acres in the Santa Catalina Mountains near Tucson; it was 40 percent contained as of Wednesday morning. ORO VALLEY, Ariz. (KVOA) – Just three months after the Bighorn Fire erupted in the Santa Catalina Mountains, crews are now battling a new wildfire in this area. "This fire has been really complex from the [beginning]. Dry, windy conditions pushed the fire closer to communities and forced evacuations. Resources: Fire information line: (520) 329-7439 8 a.m. - 8 p.m. The fire "threatened approximately 850 homes around Oro Valley and the Catalina Foothills," according to a news release from the Federal Emergency Management Agency. The cause of the fire is under investigation by law enforcement. The 3,300-acre Bighorn Fire formed in the Catalina Mountains on June 5 as a result of lightning storms and has since burned across the Pusch Ridge Wilderness and Pima Canyon area. The fire burned across the Santa Catalina Mountains for more than a month, after being ignited by a lightning strike on June 5. TUCSON, Ariz. (KOLD News 13) - The Bighorn Fire burning in the Santa Catalina Mountains was at 119,541 acres and is 89 percent contained as of Wednesday, July 15. CORONADO NAT. The fire has grown to approximately 47 acres, burning in Sonoran Desert scrub within the Canada Del Oro Wash in the Catalina State Park. The Catalina Fire started on the Catalina State Park in the late afternoon of October 18, 2020. One of the biggest challenges in battling this blaze is the landscape of the Catalina Mountains where it is burning. The lightning-caused fire ignited June 5 in the Santa Catalina Mountains and the Pusch Ridge Wilderness. Catalina Fire – October 19, 2020 Update.