How can I climb Mulhacen in a day?

[El Perro Negro]

The only way real you can do Mulhacen in a day at the present time is via the south ridge.

Access:
Through the town of Lanjaron to Orgiva. Turn left before Orgiva towards Capileira and Trevelez. After 20 mins you will enter a big gorge with 3 white villages high above the end of the valley. These villages are Pampaneira, Bubion and Capileira. Head round and up the gorge following the main road, passing through Pampaneira. 5 mins more just before a petrol station turn left to Capileira.

Keep following the road through Capileira and on up the hillside. 5 mins ? you will pass horse riding stables. Immediately after take the right when the road forks. Follow this rough track for 15 mins. Park at the Forestry Station barrier and car park.

Mulhacen Ascent:
There is a board next to the forestry station with a map. Head straight uphill through the forest on a marked and good track. This zig-zags uphill. When you leave the top end of the forest ignore a left turn and sign for the Poqueira Hut and instead follow the firebreak uphill to join a good road. Follow this.

Eventually (2hrs from leaving car) you arrive at the Mirador de Trevelez. A bit further beyond and a faint track leaves the road heading rightwards. This is the main south ridge access track. Follow to summit (3hrs from Mirador de Trevelez). Return same way. Return trip between 7 and 10 hours. Total ascent 2200m to 3480m. Ridge is broad and easy but take your time as the altitude will be felt.