El Yeso Rojo
Description. Begin in the Boca del Potrero Chico and head uphill into the Potrero proper. When the road forks, follow the right fork slightly uphill and out of the gravel stream bed. You will pass several cottages and ranchos. About 150m after rancho 'Los Pirules', turn right onto a gravelly road. Follow this road gently uphill 430m until you can fork left onto a smaller road. This road soon crosses a gully and climbs into an area of red soil. After a bushy section turn abruptly left and climb a short technical hill. Here begins a fun downhill singletrack - see how fast you can go! After a few gentle curves, turn abruptly left and follow the narrow, steepening, rocky track through thorny bushes. Watch out for the rock step (el Escalón) and the steep downhill that follows. Under the hill turn right and cross a large, flat, open area. Watch out for the barbed wire on the ground near the end of this section. Climb onto an old road and head right - you will soon reach the playground of Agua Salada - the salt springs. Play around for a while on the rocky circuit marked with cairns, then return following the old road. Push your bike through a gate onto the main dirt road, and head uphill (right). Cresting the hill, the road descends down into another salt flat. Just before it turns left, head sharply right up a steep singletrack. A lung-taxing, technical climb ensues. Just when you think it's over and the trail begins to level out, take a sharp right up another hard hill. Finally you reach the open, flat Mesa de las Cuevas. Check out the scary, chossy chasms that perforate the plain; they are dissolved salt veins (marked with x's on map). An old road comes in from the left; follow it uphill and when flat again, turn right and climb to a small summit. Turn left at the top and descend the hill, turn left at its bottom, then fork right onto a trail which will take you onto the old road again (this section can be easily bypassed). Ascend the old, gullied road until you reach a cairn. Turn left here onto the Las Palmas singletrack. This aesthetic downhill with gentle curves is amenable to speed, just watch out for the palm trees! It will take you to a gravelly doubletrack which descends, at times quite steeply, back to the main dirt road. You can also cut left when at the Mesa and descend the singletrack you climbed previously. (It is also easier to reach the Mesa climbing the doubletrack instead. Obviously many possibilities exist in this area riddled with old mining roads and cow trails.) Return to the canyon via the main road (very fast!) or huff another 1.3 km uphill to have a dip at the spring (see Circuit 1). If these directions are too complicated for you, let JJ take you for a spin (see Contacts). Overall, this is the most fun circuit in the Potrero and sees the most mountain bike traffic - about 2 or 3 riders per day!