Refers to a small stump or root (about the size of a knuckle) that is sticking straight up out of the ground. Typically hard to see especially in shaded areas or at night.
Small burr-like sticker seed pods that stick to clothing, socks, etc. Typically found in fields of grasses and/or wild flowers in early summer. They are more of a nuisance than anything, and they can be difficult to remove.
Meaning "in the likeness of a human" in the Inuit language. Piles of rocks used for communication and survival. The traditional meaning of the inukshuk is, "Someone was here" or "You are on the right path." Some Inukshuks are only a few rocks stacked at the endge of the trail, whereas others are more elaborate in construction and can be seen from a distance. They are also known as "Cairns" (kay-urns), or more simply "Rock Piles" (raw'k-pyls).
Little spiders that run along the edge of the trail at night. They reflect a purple/blue shimmery color when headlamps shine on them and resemble mini-disco balls.
Trailhead Running's unofficial mascot. He is really supportive and shows up at races to cheer on all his two-legged friends! Also has a modeling career posing for art found in local Austin bagel shop. (He is not the dog of the "dogs hauling ass" area on the trail, but he's just as speedy.) 
Being so focused on the ground that the runner doesn't see anything else around them. Form can be upright (when running) or bent over (when stopped). Occurs most frequently during night trail runs but occasionally when the runner just can't see what the heck they are going to step on. 
Occurs during night trail running. The runner's headlamp behind you is so blindingly bright that you can't see the trail because of your own shadow. 
Fancy, high-tech bandana that wraps around your wrist. Serves many purposes including: wiping sweat, tourniquet, emergency toilet paper (one use only). 
Learn our lexicon! We've come up with some great trail terms over the years. Some are legit. Some are strictly born from own Trailhead Running fun! 