All my ranked peaks (those with at least 300 feet of prominence). Most prominence figures below are "clean" prominence, meaning this is the low-end guarantee. The actual prominence value is likely higher. One asterick (*) indicates a peak with a clean prominence just below 300 feet, but based on certain factors (LiDAR data, a study of the topo map, etc), is likely to exceed the 300-foot threshold and is counted in my tally. Two asterisks (**) indicate a peak that likely does not exceed the 300-foot threshold and is not counted.

Why 300 feet? Because, that's what everyone else does. I don't know. It's low enough to encompass a good selection of peaks, yet not so low to include a bunch of small meaningless hills. But this is subjective. In Europe and other places where metric is common, they use the 100-meter rule for their lower cutoff, which is about 328 feet. Thus, the two roughly correlate.

How accurate is this? My data is stored at both Peakbagger (PB) and Listsofjohn (LoJ). PB uses the clean (low-end cutoff) figure for prominence, LoJ uses the mean figure. However, LoJ does not include peaks outside the United States, and can be strict in what it will include (e.g. a peak with median prom of 299 feet is not included, whereas I include it based on a study of the map). Peakbagger may not include all peaks either, especially if the peak is not yet part of the approved database. This is why I keep my list, because I wanted as clear a value as possible. There are a number of peaks that have a mean prom figure at or above 300 feet that I do not feel actually meets the 300-foot rule. I look at the saddle map and other data sources (LiDAR, etc) to make this determination. I tend to be conservative and only include a peak if I feel fairly certain (p > 0.9) that it meets the 300-foot rule.

My ListsofJohn totals for ranked peaks is 2 less than my totals below. My list includes five ranked summits outside the United States, plus two more inside the country whose actual prominence is very likely above the 300-foot threshold, but whose mean is slightly below 300 feet.