A survey of reported comparative constructions in the Koyukon, Ahtna and Tanana Athabascan languages of Alaska shows that many fall into A dimensional verb is accompanied by a modifying postpositional phrase, with the standard being the object of the postposition. Superlatives are not as well represented in lexical documentation as comparatives, which are themselves rare in texts and difficult to elicit. Structured elicitation of comparatives and superlatives in Ahtna and Koyukon supports observations that this rarity is related to cultural norms in Athabascan communities, where comparison (especially of people) can be considered rude, and superlatives evidence of inappropriate pride.