Not that I know of but you can link up the following quite nicely to get to St Mary Cray from central:
Q1
Ravensbourne River
Waterlink Way
Beckenham Place Park
Slightly shit time around Bromley
Jubilee Country Park
Not the quickest way there, but pretty chill and away from busy roads on the whole.
In. Is there a forum accepted route for the ride out?
Train out:
1) middleofnowhere
2)
Ride out:
1) rod_munch
2) jaeyukdapbap
3) seager
4) cagimaha
5)