There will be beating bounds around Leyton Marsh on Rogation Sunday 5 May.
All are welcome to join in the procession which leaves the Princess of Wales next to Lea Bridge at 2.15pm.
This year the walk is due to follow the southern boundary of the Leyton Lammas Lands.
Rogation processions round the parish praying for a good harvest date from the early 8th century. In some places it was also the custom to check that the boundary stones remained in place and ceremonially beat them with willow wands as in the Lea Valley.
Full details are on the Save Leyton Marsh website.