The beauty of Dinosaur National Monument is the variety of rock formations, wildlife, and of course plants. The monument wants to remind the public that one of the common plants growing throughout the area is poison ivy. Western poison ivy has an oil resin that will cause an allergic reaction that results in an itchy, blistering rash. The most common areas to run into the noxious plant is near water so be extra aware around the Green and Yampa Rivers. The Hog Canyon Trail is brimming with it. Even with the heat it is recommended that when hiking wear long pants. If  you do happen to get the oil on your skin rinse with warm water and know that the longer you wait to rinse, the less effective that rinsing will be.