| Little Regret Peak | |
| Elevation Ft: | 11090. |
| Elevation Ref: | [1] |
| Prominence Ft: | 310. |
| Isolation Mi: | 1.60 |
| Isolation Ref: | [2] |
| Parent Peak: | Mount Breitenbach (12,140 ft) |
| Map: | Idaho#USA |
| Label Position: | bottom |
| Map Size: | 240 |
| Location: | Salmon–Challis National Forest |
| Country: | United States of America |
| State: | Idaho |
| Region: | Custer |
| Region Type: | County |
| Coordinates: | 44.0868°N -113.6833°W |
| Coordinates Ref: | [3] |
| Range: | Lost River Range Rocky Mountains |
| Rock: | Limestone[4] |
| Age: | Mississippian |
| Type: | Fault block |
| Topo: | USGS Leatherman Peak |
| First Ascent: | 2005 by Rick Baugher |
| Easiest Route: | scrambling |
Little Regret Peak is an 11090adj=midNaNadj=mid mountain summit located in Custer County, Idaho, United States.
Little Regret Peak is part of the Lost River Range which is a subset of the Rocky Mountains. The mountain is set on land managed by Salmon–Challis National Forest. Neighbors include No Regret Peak one mile south, line parent Mount Breitenbach,[2] 1.75 mile south-southeast, Mount Corruption two miles north, Leatherman Peak three miles to the west, and Borah Peak, the highest peak in Idaho, is seven miles to the northwest. Precipitation runoff from the mountain's slopes drains to Pahsimeroi River. Topographic relief is significant as the summit rises 2700abbr=offNaNabbr=off above the East Fork Pahsimeroi in one mile.
Based on the Köppen climate classification, Little Regret Peak is located in an alpine subarctic climate zone with long, cold, snowy winters, and cool to warm summers.[5] Winter temperatures can drop below −10 °F with wind chill factors below −30 °F.