Normally I'd say have a run up the Isabel Trail, which used to be the Stafford to Uttoxeter railway, but it's currently flooded under the Eccleshall Road bridge. You could still run part of it up to the point of the flood.
In the same area, you can run around Stafford Common off Stone Road.
In the town centre, there is a riverside path that takes you through the park, past Stafford Town football club and onto the canal towpath depending on how far you want to go.
Also, there is the Millennium Way, which is the route of the disused Stafford to Wellington railway, towards Derrington and Gnosall.
If you're free at 0900 on Saturday, there's the Parkrun, which is currently 4 laps of the rugby club.
If your preference is for a bit of trail running, there's plenty of routes on Cannock Chase, which is either a short drive away, or you can catch the train out to Rugeley then walk / run up to there.
I won't be around next week as I'm up at my partner's flat in Manchester so will be doing one of the Manchester or Salford Parkruns.