My time spent in that area has mostly been mountain biking in the Crested Butte area. But I have gone on a few hikes around there.
If the locals rate a trail as "Hard" or "Strenuous", then it definitely feels that way if you spend a lot of time near sea level like me.
In late September above treeline we ran into plenty of snow. This is me heading over Triangle Pass on the Conundrum Creek trail.
This is me at 11,200' a bit southeast of the Maroon Bells trying to figure out where they keep the extra oxygen around here.
During February we hiked north of Gothic towing sleds and camped for a week.
It was really cold but sleeping in snow caves kept me at a toasty 30 degrees at night.
Have fun hunting there. It's a pretty area to be in. We didn't run into anyone on this particular hike. We had the place all to ourselves.