Great experience booking a couple mountain bikes from AOA for a Sunday ride at nearby Brown's Ranch Trailhead. The front desk staff were very friendly and helpful. We paid $30 for a 4-hour rental for the base, hardtail mountain bike option. I was pleasantly surprised to find out all the accessories we needed - helmets, water, Gatorade concentrate, bike carrier for a sedan - were provided at no extra charge. The quality of the bikes were good - one had slightly worn tread but it was still fine for the trails we were riding. We returned the bikes about 30 mins late and were not charged anything additional. Overall great value for money. Will definitely come back again the next time I'm visiting the area.