From Gloucester train to Chepstow, walk to Chepstow, Bus Station (Chepstow Bus Station), then bus to Wyesham Turn. 1 h 30 min £15. From Gloucester, Bus Station line 31 bus to Coleford, Angel Hotel then bus to Monmouth, Bus Station (Monmouth Bus Station). 2 h 2 min £9. From Gloucester taxi to Monmouth. 38 min £130. From Gloucester drive to Monmouth. 38 min £5.