On this second visit to this area we drove the shuttle to San Sebastian Sedas, where we unloaded our bicycles and began riding the old railroad grade down to the village of Olivera, 8 miles (12.9 kms) distant. From there we commenced pedaling a 17.8 mile (28.6 kms) loop that winds up and around the mountains before descending to rejoin the railroad line further down the valley, which then brought us back to Olivera. The whole route covers 33.8 miles (62.6 kms) with an elevation gain and loss of a bit over 3000 feet ( 915 meters). Sadly, we did not allow enough time to complete the loop, so we had to turn back early (rain clouds on the horizon hastened this decision). It was a wonderful ride, nevertheless. We logged almost four hours in the saddle. Riding the full loop would likely take an additional 1.5 hours, making for a long day's outing.