Afon Eden is a tributary of Afon Mawddach. It runs in a mainly southerly direction from Trawsfynydd to Y Ganllwyd where it joins the Mawddach. It is a spate river strewn with boulders and with a peaty stain to the water. The upper reaches have some deep pools as the river meanders slowly through the peat before increasing in speed towards the lower end.

There are some nice deep pools and glides which hold brown trout typically up to three quarters of a pound. There is a run of sewin and salmon towards the end of the season.

Three beats of the Eden can be booked online with the Fishing Passport.