Fallen trees present hazards trailwide, including on Mount Hood. Please see this article detailing an incident where a horse fell ~200 feet near Zig Zag Canyon while trying to cross a log.

https://www.oregonlive.com/pacific-northwest-news/2022/08/a-healing-miracle-after-a-horse-falls-200-feet-near-timberline-lodge.html

“As Mandt walked in front of Oriana on the steep, crumbling trail, she led the horse by a rope and encouraged the horse to weave between the fallen trees.

That’s when a stirrup on the horse’s saddle caught a log. Oriana lost her balance, then struggled to get her feet under her, tipping over.”