Zia Park in Hobbs, N.M., has an enviable problem heading into its 53&#45;date mixed meet for Thoroughbreds and Quarter Horses that opens on Saturday: Too much horsepower.&ldquo;I wish we didn&rsquo;t have as many people on hold for stalls as we do,&rdquo; said Mike Shamburg, director of racing and racing secretary for Zia. &ldquo;We had requests for over 3,500 stalls, and we can only allot 1,440. There&rsquo;s plenty of horseflesh, which is nice.&rdquo; Zia, which is owned by Penn Gaming, operates a 750&#45;machine slots casino. Its revenue has helped lift purses to a projected $230,000 a day for the meet that runs through Dec. 7. The wealth is improving the racing. The first card of the season is led by a stakes&#45;quality $40,000 optional claiming field of New Mexico&#45;breds, and it has a purse of $39,200. &ldquo;The New Mexico&#45;breds have improved leaps and bounds every year because the purses here are excellent for allowances and stakes,&rdquo; Shamburg said. &ldquo;The open horses are also getting stronger year by year. We&rsquo;re seeing better&#45;bred maidens, and owners and trainers who seem to be buying a lot of horses from California.&ldquo;Our visibility is gaining because of the purse structure.&rdquo; Zia&rsquo;s stakes program is led by the $2 million New Mexico Cup on Oct. 31. The program will feature 11 stakes for New Mexico&#45;bred Thoroughbreds and Quarter Horses, and is the richest program of its kind in North America. Other top races during the season include the $200,000 Zia Park Distance Championship at 1 1/8 miles Dec. 5, and the $150,000 Zia Park Derby at 1 1/16 miles Dec. 4. &ldquo;The Zia Park Derby is one of the year&rsquo;s last straight 3&#45;year&#45;old stakes in the country, if not the last,&rdquo; Shamburg said. &ldquo;It&rsquo;s a nice fit for those who want to duck the older horse at least one more time.&rdquo;Shamburg said the top 10 trainers from the 2009 meet have returned to Zia, with Henry Dominguez set to defend his title. Jack Bruner, a private trainer for Lone Star Park&rsquo;s perennial leading owner, Tom Durant, has returned to his New Mexico roots with a division of horses. Jockey Justin Shepherd, who will team with Bruner, is another new face at Zia.Steve Asmussen, North America&rsquo;s leading Thoroughbred trainer by wins, and Paul Jones, who holds the same distinction for Quarter Horses, both have divisions at Zia. &ldquo;It&rsquo;s kind of unique that the No. 1 trainers in both categories are in one place,&rdquo; said Shamburg. Shamburg said Zia is scheduled to run 11 races a day. The first card features 10 or more horses in five of those races, with Sunday&rsquo;s program led by the $100,000 Premiere Cup.