great exercise. there are deer and mountain lions. I don't have much survival instincts so I wasn't very prepared for seeing mountain lions. I wish I would have known there were some in the area so i could research and be better prepared. i went on the goodspeed trail and saw it within the first mile. Be prepared yall. also, It was over 90° & it was pretty rough. I would suggest going in that heat.
The majority of this trail is a steep ascent through heavy forest with no views. It's not particularly enjoyable as larger parts are just fire road. The old homestead meadow is a nice break spot. The gem is that view from Gunsight. The extension from the summit of Mount Hood (which is treed and has no views) out to Gunsight is rocky and tricky in spots. It's well worth it though for the view.
I'm a regular trail runner and I did this trail on a relatively moderate temp day. It was too hard to actually run up. There is a lot of trail mixing with road at first. Once you get about 2 miles up, it's a lot of nice wooded trails and much easier to run.