Running 11:26:00  41.0 mi (16:44 / mi) +8000ft 14:07 / mi
Now I know why there aren't many trip reports about this one.
My single biggest one day outing besides a pair of 100k races...
Wild Basin to Grand Lake and back (via Boulder-Grand Pass, twice).
Start Time: 6:45am
1st traverse over Boulder-Grand Pass: 9:13am
Grand Lake (West Portal TH): 11:56am
2nd traverse over Boulder-Grand Pass: 3:48pm
Finish Time: 6:11pm
The weather was absolutely perfect. Almost no winds, warm sun.
Ate: 1 rice ball, 1 pb & honey, 1 granola bar, 1 pack orange crackers, 2 fruit squeezies. Not enough food, I should have packed more.
Pack: worked well but I had some pretty nasty bruising near my hips at the end.
My body was really sore for the last several hours. This was in part bc of the offtrail portion, but in part because of the mileage. I set out to do only 31 miles. My ipod tracker back at the car that evening showed 44.4 miles. It overestimates these sorts of things, but not by more than a few miles. In fact, I have a conversion that works well for this type of outing (shorter steps, steeper terrain), and that puts me right around 41 miles. Hence why I ran out of food.
Just like the few available reports online say, there is not one 'great route' between Boulder-Grand Pass and Lake Verna, where you pick up the trail again. On the E to W route, I stayed high on the ridge for awhile then dropped down closer to Lake Verna - a pretty gnarly set of log crosses, creek crosses, and steep off trail descent. Portions of a foot path visible here and there, but not much. On the W to E route, I stayed by the lakes all the way up to Fourth Lake, and this foot path was rather nice actually. But upon reaching the top (east side) of Fourth Lake and noticing that the trail seemed to be headed towards Fifth Lake, I bailed offtrail and uphill. Very steep here. Legs were very tire all the way to the pass.
I wore MA's size 10 pearl izumis yesterday, hence no more mileage added to my rapidly aging pair.
Beyond the 2 miles on either side of the parking lot (Wild Basin, West Portal), I saw almost no one. Exception was a very young couple (new friends: Jack and Kira) headed to a cabin in Grand Lake (they did the traverse in the one direction).
New favorite campsite (in addition to last saturday's find)... offtrail portion of the East Inlet drainage, complete with a sandy beach.
An absolutely A++ rating of labor on this Labor Day holiday. Very special, and to be remembered for a long time.