I tried PMing Yosemite_Indian as suggested by mrcondron, but I have not received a response. I recall reading something about this last year and the year before, but now I just can't find any info. I sorta had it in my mind that they travelled further than TM, but then I realized that the old Mono Trail north of the Valley is, I believe, not even easily found. Perhaps I'm confused on that point, but I seem to recall multiple posts about some folks here trying to locate the original trail at various times.
Realizing that Native Americans have travelled around Yosemite for a very long time adds an additional dimension to the myriad of reasons to love and have a connection to the place. I have tried a bit to read some historical accounts of Indian movement through the area along the Mono Trail, but it seems that even that is not particularly clear. Different accounts suggest that the Paiute, the Miwok and the "Mono Indians" all used the trails. I'm not sure if Mono Indians is a separate thing or if it is a different type of reference to the Mono Paiutes. And then I stumbled into the apparent disagreement and tension regarding what tribe inhabited the Valley and did various things. Some contend that the Miwok are being credited for historical activity that should be attributed to Paiutes. If so, that is unfortunate.
In any case, It seems that the Mono Trail came up from Mono Lake area through Blood Canyon and then split at Tenaya Lake, with one arm continuing west through the land north of Yosemite Valley where there were various paths used to descend into the Valley, and another arm of the trail headed south, past Nevada Falls, through the Illiluoette area, and perhaps on to the Wawona area. Maybe all of these branches were traveled by various tribes to meet other tribes for trade and to simply move to more a more favorable climate as the seasons changed. I haven't read enough about it to have the various Native Americans, the places the inhabited and the paths they travelled clear to me yet.
A ranger in the park first mentioned this to us a year or two ago. My nephew was mentioning it to a teacher of his, who then became interested in the intersection of the past and the present, where one goal is to keep the culture// traditions alive within the current generations of Native Americans.