Miss the first red pointing down hill after the top of the skills / bike play area.
Just carry straight on and pick up the red again by the bench when the road bends or the right.
Nonsense! Pennels Vennel is a great bit of trail and the subsequent climbing is mostly up singletrack instead of slogging up the fire road as suggested above. It’s also a useful indicator – there’s nothing on the red that’s harder than it so if you’re feeling uncertain following your injury it’ll give you a good idea whether you want to continue on the red. If you don’t, you can pick up the blue from the end of Pennels Vennel.
Berm Baby Berm and most of the rest of the blue are definitely fun. The black is longer and rougher than the other trails but except for a few bits isn’t significantly more challenging than the red. It’s more of a grower than the other trails which are immediately obviously fun.
The trails at Glentress are very interconnected. If you can join up with a local or can get to grips with the trail map (which is a bit convoluted at times because some stuff is so close together) it’s possible to mix and match a wide selection of trails together into one ride.