Ticks are a common pest found on hiking trails. They are small arachnids that feed on the blood of mammals, including humans. Ticks can carry and transmit diseases, such as Lyme disease, making them a potential health hazard to hikers. It is important for hikers to take precautions when out on the trail, such as wearing long pants and using insect repellent, to reduce the risk of being bitten by ticks.