Grouse Hill - Prominent Geological Features of Crater Lake National Park

 

A short distance beyond the north rim of the caldera rises the steep-sided and wooded Grouse Hill. Diller supposed that the lava of Grouse Hill was older than the Llao Rock flow. There is, in fact, no way of deciding which of the two flows is the older. Probably they are of about the same age. Grouse Hill may be divided into two parts. At the south end there is a domical hill, approximately 3/4 mile in diameter. Here the flow planes are arranged in a crudely concentric manner about the summit. To the north lies a mesa, approximately 1/2 square mile in extent ... [The Northern Arc of Vents: The Grouse Hill Dome and Flow, The Geology of Crater Lake National Park, Oregon (1942) by Howell Williams]

Grouse Hill map, The Geology of Crater Lake National Park, Oregon (1942) by Howell Williams

1. Applegate Peak 2. Bald Crater 3. Cloudcap 4. Crater Lake Caldera 5. Crater Peak 6. Desert Cone 7. Devil's Backbone 8. Dutton Cliff 9. Eagle Crags 10. Garfield Peak 11. Godfrey Glen 12. Grouse Hill 13. Hillman Peak 14. Kerr Notch 15. Llao Rock 16. Llao's Hallway 17. Maklaks Crater 18. Mazama Rock 19. Mount Scott 20. Palisades 21. Phantom Ship 22. The Pinnacles 23. Pumice Castle 24. Pumice Desert 25. Pumice Point 26.  Red Cone 27. Redcloud Cliff 28. Rugged Crest Scoria Cone Scott Bluff Sentinel Rock 29. Skell Head 30. Sun Notch 31. Timber Crater 32. Union Peak 33. Watchman 34. Williams Crater 35. Wineglass 36. Wizard Island Note: the numbers associated with each feature name above correspond to their place on the Custom Google Map below

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