I can't attest for Tyrolean or some of the other sites in/around Summit Co yet. From my location near Summit Cove the Keystone site has the strongest signal and is usually my go-to for listening simply for a higher decode rate.
Lake Hill:
-Always carries SC LAW, SC ES, SC TONE, and CSP 4C
-Pretty much always carries SC 3 thru SC 9 when in use
-Also frequently carries NW net (lots of chatter between dispatch centers whenever they close/open Glendwood canyon).
-Frequently gets affiliations form Grand/Eagle Co
Keytone:
-Always carries SC LAW, SC ES, SC TONE
-CSP is hit or miss, usually only when a trooper is on Hwy 6 on or close to Loveland pass.
-SC 3 thru SC 9 are usually hit or miss when in use
-This is a 700-only site, I rarely see Grand or Eagle Co on this site (possibly because they have 800mhz only radios in use)
I use a BCD996XT that I remotely control with proscan to listen remotely. I assign my quick keys based on site so I can easily toggle different ones on/off. From my location Lake Hill can be a little garbled so I typically monitor with the Keystone site - if an interesting call comes in I usually try to monitor the SC 3 thru 9 channel that gets assigned on that site first, if it doesn't affiliate I then turn on Lake Hill.
SC 3 thru 9 seem to be assigned based on geography (likely from when they were using VHF OPS channels). If a call gets assigned one of those channels in the Breck area it will likely be on Tyrolean.
Also, if you have the capability to monitor the other DMR/NXDN formats the resort/MC&E systems have plenty of stuff to be discovered on them still. Last week I found 3 or 4 new talkgroups on the MC&E Tier-3 system in use by Keystone Resort. If you program those in be sure to leave your scanner in open or search mode. Did you know that if you drive a golf ball through someone's window on the Keystone golf course they make the homeowner pay to replace it?