Original sentence: A panoramic view of the city of Monterrey can be seen from the top.Located in the cities of Monterrey and Guadalupe, it covers an area of 60.5 square kilometers; (23 mi²).Set aside as a Natural Monument by the government of Mexico in 1991, the hill is a popular recreational area and is often climbed by hikers who take a 2.5 kilometer (1.6 mi) trail to reach the top.The ascent is considered fairly difficult, requiring approximately 3 hours to complete.The mountain has four peaks: Pico Antena, Pico Norte, Pico Sur and Pico la Virgen; Pico Norte is the highest at 1820 m (5970 ft) while Pico la Virgen is the lowest at 1750 m (5740 ft)
Edited sentence: Located in the cities of Monterrey and Guadalupe, it covers an area of 60.5 km² (23 square miles).Set aside as a Natural Monument by the government of Mexico in 1991, the hill is a popular recreational area and is often climbed by hikers who take a 2.5 kilometre (1.6 mile) trail to reach the top.The ascent is considered fairly difficult, requiring approximately 3 hours to complete, but the panoramic view of the metropolitan area of Monterrey makes the climb worth the effort.The mountain has four peaks: Pico Antena, Pico Norte, Pico Sur and Pico la Virgen; Pico Norte is the highest at 1820 m while Pico la Virgen is the lowest at 1750 m