131020
Hikers , mountain bikers , and horseback riders could use the of unshaded dirt roads in the park along with the trails leading to archaeological sites .
 horseback riders
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 horseback riders