I did 60 Lakes Col from west to east, so that's how I'm going to describe it.
- Route along the shore of the main Gardiner Lake
Starting from the outlet of Gardiner Lake, I was told to traverse the south shore. This definitely goes, but the north shore looked easier from afar, so YMMV. Moving east, the shoreline will go for about a quarter mile, then cliff out. Look to your right and grip-walk up bare granite until you gain the top of the ridge paralleling the shore.
- Beginning the bypass of the cliff. 60 Lakes Col is the low spot right below that dramatic horn. I'm walking to the right to gain the ridgetop to the far upper-right.
Continue along this for a few hundred feet until you can look down a chute that's lined with pines on its left side and takes you down to a flat plain below. Take this down - it's easy going - and then continue along the shore about another quarter mile.
- Looking down the return to lakeshore, down an easy dirt chute with an obvious line of trees on its left (west) side.
In mid-June of a dry year, there was a very steep snowfield with a sheer drop into the water at its foot. I was able to wade through the lake to get around this, only getting into the water about hip-deep (I'm 5'7"). After this, it's talus all the way to the col.
- This snowfield didn't seem safe to cross, but wading along the base of it was easy, if cold.
- Crossing 60 Lakes Col proper
It doesn't seem to matter how you proceed from here, just aim toward the low point in the ridge off to the southeast. It's all talus of varying size, so pick whatever way is easiest and make for the col. You'll really want to bend south from here, since the ridge loses elevation and gets less steep to the south.
- Looking back at Gardiner Lakes from near the summit of 60 Lakes Col.
As you approach the low point, you'll find a relief from the talus in the form of a few granite ledges that make for easier walking, which carry you south and up a little toward the col. After a brief little chute running northeast, you'll come to a broad ledge that's basically on top of the ridge, but has a steep granite fin blocking the view to the east. Walk north along this ledge until you come out from behind the fin and can see down to the east.
- The flat corridor that leads you north along the base of the granite fin (right above the narrow snowfield) and slightly east over the col.
The east side of 60 Lakes Col is intimidating, and looks like it should cliff out. A cursory exploration reveals that a series of serendipitous ledges zigzag down the east side to flatter terrain below. This area definitely could be made into Class 3 terrain by taking the wrong route, but I was able to find and all Class 2 route descending ledge to ledge without any trouble. If it starts to get Class 3, backtrack a bit and find some ledges that connect. There was a pretty decent use trail and cairns at one point, but I lost it quickly and just made my own way, which was easy.
- Looking back up at 60 Lakes Col from the east. The granite in the center of the photo is steeper than it looks, but has lots of ledges that interconnect easily.
- Down the 60 Lakes drainage and to the 60 Lakes Basin trail
After descending, continue due east over flatter terrain toward the tarn at 11,293', then angle north and down-drainage. I found it easier to stay on the east side of the creek for most of the way down, but I'm sure either side will go.
- Looking down toward 60 Lakes Basin, easy slab-walking
Right before you arrive at Lake 3304 the terrain gets steeper, I crossed to the west side of the creek briefly, then crossed back to the east right before gaining the shore of Lake 3304. From here, cross the inlet stream right where it dumps into the lake and start north along the west shore of Lake 3304. You will find a use trail starting right at the inlet. Follow this until it starts switchbacking aggressively up the slope to a distressing and seemingly unnecessary height. At the very top it gets faint, but seems to run through a little channel between two whitebark pines and out onto a broad, grassy bench.
Follow this bench north until it gives way to a grassy slope leading back down to the shore.
- The grassy slope makes of the north end of the cliff bypass
Coming over the pass east-to-west, finding the right spot to descend off this bench would probably be difficult, as the use trail kind of ends before gaining the bench. Look for a spot where you can kind of push through dense whitebarks and follow a little trench in the granite down to a cairned use trail below. My map approximates the spot, but isn't a GPS track.
After the bypass, it's easy grass and sand north, across the drainage again, along the east side of the next lake to the 60 Lakes Basin trail.
"It is a wholesome and necessary thing for us to turn again to the Earth, and in contemplation of her beauties to know wonder and humility"
- Rachel Carson
Short Class 3 section above Lake 3304
The rest is Class 2 - the Col is above the snow field center top
Easy granite slabs below the Col 
Getting closer!
Grassy ramps below the west side of the Col
The short talus field just below the snow field below the Col
Snow field below the Col -- I went around it to the south (far side) on class 2 stable talus
Sixty Lakes Basin from the Col
Looking north along the ridgeline from the Col
Looking back towards the Col from the largest lake above Lake 3477 
Looking back towards the Col from a tarn above Lake 3477
Looking forward towards Lake 3477
Looking back towards the Col from Lake 3477