They seem to grow in Michigan and Northern Indiana, so they should grow for you. Start them inside as soon as you can-maybe in peat pots so the roots will not be disturbed.
I have bought the Indiana ones.....

It will greatly depend upon your growing zone. Here in zone 5, the growing season isn't long enough to harvest hard shelled kettle gourds. Here we have to stick to small gourds or ornamental gourds.

well, I grew up in TX and my dad grew them...so I check out TX gourds and found:

http://www.thegourdreserve.com/seed_germination.html

http://aggie-horticulture.tamu.edu/southerngarden/Growgourds.html
leader of gourd society in TX

http://www.geocities.com/tgs_southeast/Documents/GrowingGourds.html?200911
another SE TX site

http://www.freewebs.com/arlingtongourdpatch/plantingandgrowing.htm
Arlington TX

http://laurie1_2.tripod.com/mygourds/growgourds.htm
Houston TX

Had to laugh at a reply in this post
http://forums.gardenweb.com/forums/load/txgard/msg0422265717010.html

Now I reread the post and see you live in Colo so will go back and check that for you. June

http://www.lladyhawkllamas.com/llavender_products.htm
She paints gourds and talks about kettle gourds grown there, might check with her

http://cap-n-ball.com/gourds/
this family raises gourds on their farm in Rocky Mtn Hi.

twomonths I live in Colo. not Tx. but thanks anyway.
Also tried the other links and they have nothing to tell me about growing them in Colo. Thanks for your time.

Here are some good gourd growing sites that I found...

http://www.thegourdreserve.com/what_gourd_to_grow_in_your_area.html

http://www.foothillsfarm.com/ginnysgourds/growingtips/growingtips.htm

http://www.twincreek.com/gourds/growing.htm