There is one pack station and one stable in Kings Canyon National Park, and one pack station in nearby Sequoia National Forest. All are closed from late fall to spring, but exact dates vary. Each offers specific services; check with them for details and prices.
In Kings Canyon National Park:
Cedar Grove Pack Station
1-559-565-3464 (summer)
1-559-337-2314 (off season)
Grant Grove Stables
1-559-335-9292 (summer)
1-559-337-2314 (off season)
In Sequoia National Forest
Horse Corral
(between Lodgepole in Sequoia National Park and Grant Grove in Kings Canyon National Park)
PO Box 546
Woodlake, CA 93286
1-559-565-3404 (summer)
559-564-6429 (off season)
1-559-679-3573 (cell)