Derek Percoski Completes the Blaine County Peaks

Idaho 12er

Derek Percoski finished the Idaho 11ers on July 15, 2021 but even more impressive was his second mountaineering accomplishment. On July 15, 2022 Derek completed his quest to climb all 329 ranked summits in Blaine County, Idaho. His quest covered a wide variety of summits and terrain including volcanic buttes in Craters of the Moon National Monument, the high Pioneer … Continue reading

11er Finisher List as of December 2025

The list of 11er finishers continues to grow. Recent LiDAR measurements have added peaks that were previously unranked to the ranked list. This includes one new peak in the Pioneer Mountains which was remeasured in late 2025. Derek Percoski and Brett Sergenian are the only person listed below who have climbed that peak. Nevertheless, credit for finishing the 11ers is … Continue reading

Derek Percoski the first to Climbs Idaho’s Highest 500 Peaks

On August 2, 2025 Derek Percoski became the first person to climb the highest 500 ranked Idaho peaks. This journey included all of the 12ers, 11ers and 10ers plus a few 9ers. Derek celebrated his accomplishment by gathering a group of Idaho peakbaggers to climb Peak 10,309 in the Lost River Range. This group included 13 11er finishers. We dubbed … Continue reading

Derek Percoski is the first to Climb Idaho’s 500 highest Peaks

On August 2, 2025 Derek Percoski became the first person to climb the highest 500 ranked Idaho peaks. This journey included all of the 12ers, 11ers and 10ers plus a few 9ers. Derek celebrated his accomplishment by gathering a group of Idaho peakbaggers to climb Peak 10,309 in the Lost River Range. This group included 12 11er finishers. We dubbed … Continue reading