Yet another wild attempt at the process of elimination....

Trail 554 heading towards Welcome Lakes

You are getting warmer.

I'll try Mother Lode 558 trail

Bryon

How about Baty Butte or the boundary trail south to Joyce Lake?

Don

Bryon:  You are getting really close, but you've gone a little bit too far south.

Don: You are too far west and need to come a little farther south.

For those playing along at home, a small hint (if you haven't figured it out already) - this trail is in a wilderness area.