30 years ago there was not much choice regarding trail running shoes. It was with great excitement that Nike introduced a trail shoe back then called the Air Terra.
It had some innovative features such as a convex sole that prevented catastrophic ankle rolls. So I bought a few pairs from the local Athletes Foot store in Bozeman. That store disappeared long ago.
On a recent training sojourn, my last Air Terra expired as the outsole totally delaminated from the midsole. Normally I would try to glue it back together as they appeared to still be in workable condition. In this case repairing and resurrecting a 30-year-old trail shoe was not possible. The midsole foam had turned to crumbly powder.
Sad to dispose of a benchmark of trail running history and innovation. So keep that in mind. Running shoes degrade from not just use, but also with time. The adhesives and foam materials become brittle and eventually just disintegrate over time.
Bridger Ridge Run 