That's great. You will enjoy it.
Make sure you have trail running shoes and a hydration system with room for a rain jacket.
A killer run right out of Frisco is the Mt. Royal trail. Super steep. If you can run that all the way you are good.
Buffalo Mtn out of Wildernest is another one.
Running up a 14er could be the last run before you leave. Mt. Quandary.
There is a trail hiking book available at the local bookstore. Also the running store in Breckenridge is very helpful. Get the trail map for the area.
https://www.breckenridgerecreation.com/locations/open-space-trails/trail-maps
Make sure you learn about trail safety and always take a rain jacket, gloves and a head. I am not joking. This is high country and it can snow any time of the year and thunderstorms can be fierce.
Enjoy, this will be something you will remember for a long time.