- Weather: The weather could be extremely harsh on the Oregon Trail. Travelers faced the risk of hailstorms, blizzards, and scorching heat, as well as treacherous river crossings during heavy rain.
- Disease: Disease was a major health concern for pioneers on the Oregon Trail. Common illnesses included cholera, typhoid fever, and smallpox. Many pioneers became ill from lack of sanitation, poor diets, and drinking water contaminated by animal waste.
- Animals: Wild animals posed a significant threat to pioneers. Bears, wolves, and mountain lions were known to attack both humans and livestock. Coyotes and smaller animals could also be a nuisance.
- Terrain: The rough and rugged terrain of the Oregon Trail made the journey difficult and slow. Pioneers encountered steep mountains, deep valleys, dense forests, and wide, raging rivers.
- Lack of supplies: Resupply points were few and far between along the Oregon Trail, so pioneers needed to carry all the food, water, and supplies they needed for the entire journey. If they ran out of supplies, they could be in serious trouble.
- Bandits: Although rare, bandits were a danger to pioneers on the Oregon Trail. These outlaws were often desperate individuals who would rob travelers for their money and supplies.
- Loneliness: The Oregon Trail was a long and arduous journey, and many pioneers felt lonely and isolated. They missed their friends and family back home, and the vast wilderness of the West could be overwhelming.