Lora,
I do a lot of fell running which is similar to trail running in that it is cross country.
Here are the shoes I use -
Top left are Inov8 Mudclaw 333's, top right are Walsh Fellrunning ankle boots ( old pair I have had for years and are discontinued now ), bottom left are a new pair of Inov8 Mudclaw 300's and bottom right are salomon fellcross 1 LAB's.
From the "new" shoes you can tell I prefer the Inov8 Mudclaws - but that is solely to do with the specific fit they give my feet. Their 11.5 is just slightly longer than the Salomon 11.5 in length which helps when going down steep gradients to avoid toe crush with your big toe moving forward in the shoe and catching the end. This can cause the loss of a toe nail over time.The Salomon's only go up to 11.5 so I cannot improve on the fit of the existing shoe but technically I like the Salomon better.
The lace system with it's lock fitting is a brilliant idea. It enables gradual minor adjustment to loosen the fit as your feet swell with distance - or it enables a tightening of the shoe if it gets soaked and stretches. The adjustments are super quick and avoid re-fastening the laces. They can be done in "micro" increments and are a fantastic benefit when doing big mileage cross country.
I like this feature so much I bought an after market accessory lace lock system for my Mudclaw 333's. See these on locklaces.com.
All my shoes work well on mud and wet grass and snow - they cope with terrain where I live which is pretty rugged.
The best pattern for a sole where you have steep gradients is definitely wide spaced deep studs.
Salomon and Inov8 both do shoes specific for a female fit.