Assuming you are not from Oswestry and haven’t already done these:-
Trail Running:-
Long Mynd up Ashes Hollow and down Carding Mill Valley.
Up and back down the forest track to Rodney’s Pillar on Breidden Hill. Some nice views at the top.
Plenty of ace trail running in and around Nesscliffe woods.
Mountain biking:-
Long Mynd. There’s a trail map online somewhere.
Llandegla and check out Llantysilio mountain nearby.
There’s some good riding on Berwyn mountain but I guess it will be bog central at the moment.
Eastridge woods and the Stiperstones and Hopton Woods which is brilliant this time of year.
Cadair Idris a good day out but quite a drive.
There’s also the Marin trail, Coed Y Brenin etc within 1.5 hours as well as the superb (IMHO) Nant Yr Arian.
Stu