River Lugg

River Lugg Afon Llugwy
River Lugg at Hampton Bishop
Data
location	Powys ( Wales ), Herefordshire ( England )
River system	River Severn
Drain over	River Wye  → River Severn  → Atlantic Ocean
source	at Llangynllo in Powys 52 ° 21 ′ 29 ″  N , 3 ° 12 ′ 20 ″  W.
Source height	497  m
muzzle	near Mordiford, Herefordshire in the River Wye Coordinates: 52 ° 1 ′ 52 "  N , 2 ° 38 ′ 6"  W 52 ° 1 ′ 52 "  N , 2 ° 38 ′ 6"  W
Mouth height	46  m
Height difference	451 m
Bottom slope	6.3 ‰
length	72 km
Small towns	Presteigne , Leominster

The River Lugg ( Welsh Afon Llugwy ) is a 72 km long river in Great Britain .

The river has its source at Llangynllo in Wales , then flows through Herefordshire in England to become a tributary of the River Wye , into which it flows at Mordiford east of Hereford .