The lists may become unwieldy, particularly at the 500 and 600 levels, if the names of higher distances are included in the lower ones, too. The inclusion in a higher mile increment, by necessity, requires exceeding a lower mileage increment, so I think only one's personal best need be listed.
The "promotion" of a poster out of one increment group and into another could become a rite-of-passage event worthy of a celebration of sorts.
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