I travel up there yearly and don't look at street signs. I believe the parade route begins on west Elkhorn Avenue through downtown ending at the Estes Park Visitors Center on Highway 34.

The Festival website has contact information if you need more specific details.

http://scotfest.com/Scottish_Festival/Contacts_Us.html

One caution get to the parade site before 8:30 am or there will be no getting up the parade route. I usually drive up past the Stanley Hotel and come to Elkhorn from the north, bypassing downtown on parade day
Thanks, Now I have to wait another week before we leave. Oh well, I guess that'll give me time to iron my kilt. See you gents there.