Three-time world champion Erik 'El Terrible' Morales is off to the cold mountains north of Mexico City and will beginning high-altitude training today.I've been running and doing conditioning work in Tijuana, but now it's time to step it up. I'll be in the mountains for six weeks," Morales said. Morales, who will face Manny Pacquiao on March 19 (HBO PPV) at the MGM Grand, trains in the mountains at The Otomi. "Pacquiao is dangerous because of his power," Morales said. "I will not under-estimate him for one second during our fight." Morales said he will run on mountain paths in the morning, spar in the afternoon and will have an early 'lights out' each evening.