hey big wave,
if you're looking to try that again with some competition you should venture to rockford IL (hour west of chicago, hour south of madison, WI, direct flights from colorado) next august. The State street mile boasts a downhill course that occasionally attracts some big international names. 1999 was probably the biggest elite turnout and still has the course records (3:53 men)http://www.drkomputing.com/results/ssm699.htm
if you just go to
then click on 'results' you can find times from all other years. some U of illinois guys usually run and the high school sections produce some impressive times too. i've found that what i run there is a good indication of my top mile time for the following spring track season.