UP. What a great word. Perfect for trail runners everywhere. 

Trucker hat with an aqua bill and aqua mesh back.

adverb 1. toward the sky or a higher position. / preposition 1. from a lower to a higher point on (something); upward along. / adjective 1. directed or moving toward a higher place or position.
 2. in a cheerful mood; ebullient. / nouninformal 1. a period of good fortune.
 / verb 1. do something abruptly or boldly.
 2. cause (a level or amount) to be increased.