Huh? Do you mean feeds from tracks around the country? Or do you mean the Belmont Stakes. I think your local NBC affiliate will air the Stakes.
Not sure if any cable company still airs the OTB channel.... I know some casinos will have feeds... but I don't know of any DBS or cable company that offers them.
Are you looking for the channel TVG? That is normally found on Digital Tier 2. Double check the channel lineup tool to verify for your area that it is offered.
Hope this helps