Sierra Nevada Bighorn Sheep In Yosemite - Cathedral Range

Cathedral Range herd movement data


Recent Events

  • 9/6/2023 Attempts this summer to find any live ewes in this herd have failed. We have only seen rams alive in this herd unit after the record-breaking snowfall winter.
  • 3/1/2023 All collared ewes appear to have died from the heavy snows this winter. The young collared ram appears to still be alive.
  • 7/21/2022 A group of 12 was observed, including 5 lambs.
  • 3/24/2022 1 yearling male and 2 adult females were captured and collared. Now we will be better able to monitor this population.
  • 6/2/2021 2 lambs, 2 yearlings, and 4 adult ewes were spotted in the herd. This is great news--the Cathedral herd persists and is reproducing!
  • 9/17/2018 4 Lambs were seen this year with a total of 8 adults. This is great news for the Cathedral range to ensure that it continues to grow.
  • 1/17/2017 All of the collared ewes, aside from S371, moved from the southwest ridge of Mt. Lyell to the Parsons Plateau.
  • 11/2/2016 5 rams were translocated to Cathedral from the Mt. Baxter herd unit.
  • 7/12/2016 11 Sierra bighorn, including 2 yearlings, were seen on the Parsons Plateau.
  • 7/1/2015 Two lambs are counted during the summer survey
  • 3/30/2015 Cathedral Herd Started with 10 ewes and 3 Rams
Parson Plateau provides wind-blown winter habitat that is partially snow-free.
Parson Plateau provides wind-blown winter habitat that is partially snow-free.
Lush summer forage on the Parsons Plateau
Lush summer forage on the Parsons Plateau

The Cathedral Range herd was reestablished in the spring of 2015 with the translocation of 13 Sierra bighorn from the Mt. Langley, Mt. Baxter, and Wheeler Ridge herds. Five additional rams were augmented to the herd in the fall of 2016 to increase breeding opportunities. Most of the Cathedral ewes wintered on the Parson’s Plateau in 2016 and 2017. With limited opportunity to breed, as well as the heavy 2017 winter, population size in the Cathedral Range has diminished, but as of 2021 the herd remained intact.