| Top Notch Peak | |
| Elevation Ft: | 10245 |
| Elevation Ref: | [1] |
| Prominence Ft: | 805 |
| Isolation Mi: | 1.91 |
| Isolation Ref: | [2] |
| Parent Peak: | Hoyt Peak (10,506 ft) |
| Location: | Yellowstone National Park Park County, Wyoming, U.S. |
| Range: | Absaroka Range Rocky Mountains |
| Map: | Wyoming#USA |
| Label Position: | bottom |
| Map Size: | 270 |
| Coordinates: | 44.4519°N -110.1431°W |
| Coordinates Ref: | [3] |
| Topo: | USGS Sylvan Lake |
Top Notch Peak is a 10,245-foot-elevation (3,123 meter) mountain summit located in Yellowstone National Park, in Park County, Wyoming, United States.[3]
The peak is situated immediately southwest of Sylvan Pass, and west of the park's east entrance. It is the 43rd-highest peak within the park.[4] It is part of the Absaroka Range, which is a subset of the Rocky Mountains. Neighbors include Hoyt Peak across the opposite side of Sylvan Pass, Avalanche Peak to the north, and Mount Doane to the south.[1] The mountain's name was officially adopted in 1930 by the United States Board on Geographic Names.[5] The descriptive name refers to a deep notch near the summit which is apparent from the park road at Sylvan Lake.[6] On August 22, 1970, Dr. Dean Jack Tiller, his wife, daughter, and son-in-law were killed when their small plane crashed into the east face of the peak.[7]
According to the Köppen climate classification system, Top Notch Peak is located in a subarctic climate zone with long, cold, snowy winters, and cool to warm summers.[8] Winter temperatures can drop below −10 °F with wind chill factors below −30 °F. Precipitation runoff from the mountain drains to Yellowstone Lake six miles to the west.