South Mountain Park in Phoenix, AZ offers a variety of trails for hiking, mountain biking and horseback riding. The Alta Trail is a moderate hike of approx. 4 miles RT starting off of San Juan Road. The trail has an elevation gain of approx. 1100'. It is best to hike in the Spring or Fall when the temperatures in Phoenix are cooler or early morning in the summer. Paul and I hiked the first week of October during the week and there were few people. We were limited on time so we did not continue on to the Bajada Loop or National Trail but these are options we may try in the future making for a longer hike. This hike offers impressive views of South Phoenix, downtown Phoenix and South Mountain Park. Parking is limited to only 5 cars so it is best to go at an off peak time.