Interesting...
2 Weeks ago I did this 3-dayer:
Glen-Aulin/Cold Canyon/Wildcat Pt./Mattie Lake/Cold Mountain/Virginia Lake
/Lower McCabe/Middle McCabe/pass/Roosevelt Lake/Youngs/Out
Lower Virginia Canyon/Matterhorn called to me from Virginia Lake and I
seriously considered dropping down and hiking out/up Matterhorn Canyon.
You are talking Hiking down Matterhorn Canyon and down Return Creek.
Anyway, I know that people hike up Return Creek to climb Petite Pk.
so it can be done... It will not be easy!!
I'm not sure I would attempt going down Virginia Canyon. Matterhorn
didn't look too bad... Miller Lake is really beautiful anyway...
My 2 cents however is:
Have you gone all way up Virginia Canyon already?
Have you checked out Summit Lake?
Have you checked out Virginia Pass?
Have you checked out the lakes near Virginia Pass?
If no on these then I'd suggest checking out Virginia Cayon entirely and
save your xcountry excursion for another day...
Mattie Lake from Cold Canyon is also simple... and Wildcat Pt. is a stone
throw away from Mattie... great views of GC of Tuolumne
Anyway, have fun