In reply to Harri777:
A few quick pointers:
- once you get past Finnieston St, its more difficult to find the river by running downhill. This is due to the train line. Best just to run back along Argyle St to get back into town
- if you get knackered, you will be passing three subway stations. Return to St Enoch's station, which is about 150m from your hotel
- the steep hill fmck mentions, is in this route
Its worth doing and pretty much downhill all the way after that. You can bypass this by running to the top of Byres Rd and then along Gt Western Rd
Enjoy!