Drove the Pemberton - Seton Portage - Lillooet - Pemberton loop yesterday. It's a long 240km drive mostly on gravel roads, but boy was it spectacular! I felt like I was not in BC anymore as there were close to 3000 meters peaks towering besides the road. I couldn't believe how different the landscape could be so nearby.
The road (Highline Trail) from D'Arcy to Seton Portage is a very bumpy and narrow gravel road with some steep sections. I would say 4x4 is recommended to make it up the steep hills, but you should be able to make it with a 2WD as well. But it is a rough road and you cannot drive fast. There are also many sections where you are driving next to a cliff with hundreds of meters of sheer drop.
The road from Seton Portage to Carpenter Lake is also steep, but wide and in good shape. No problem with any car.
I took countless photos, so it will take me some time to post anything, but it was well worth a day trip!
