Front-running Rocky Gulch was tiring fast in Sunday's $147,200 New Mexico Cup Classic at Zia Park under his 127-pound impost, but under powerful urging from jockey Jorge Bourdieu, the 4-year-old gelding got the job done as the prohibitive favorite.Rocky Gulch, sent off at odds of 2-5, won by three-quarters of a length over Cattleman Prospect, whose five-wide drive into the stretch under Alfredo Juarez Jr. was a bit belated. The time for the one-mile dirt event – the centerpiece of the inaugural $1.2 million New Mexico Cup card – was 1:39. Rocky Gulch spotted the runner-up 10 pounds and gave away 10 to 18 pounds to his seven opponents.One of the best New Mexico breds ever, Rocky Gulch has now won 11 stakes ranging in distance of 4 1/2 furlongs to 1 1/16 miles. Terry Walker trains the gelded son of Dry Gulch-Rona Prospect (by Allen's Prospect) for owner/breeder Larry R. Teague.It was the second start for Rocky Gulch, who earned $88,320 for the victory, after a five-month layoff. He paid $2.80, $2.10 and $2.10. Cattleman Prospect returned $2.80 and $2.10. It was two lengths farther back to Off Shore Prospect, who paid $2.10 to show with Ricardo Jaime in the irons.Dear Bull, Net Threat, Tietjen, Run Looker Run, and C.R. Cavalier followed.