Carers are opposing plans to close Swallow Lodge, in North Hykeham, and Cedar House, in Spalding.
Residents with double plots say they are desperate to be buried with loved ones when they pass away.
The annual North Kesteven Walking Festival will comprise more than 70 walks for people of all ages.
The leader of Lincolnshire County Council previously criticised the plan and branded it "nonsense".
A groundbreaking ceremony will mark the beginning of construction of the road south of Lincoln.
The facility at North Hykeham will increase its waste burning capacity by an extra 20,000 tonnes.
The Energy from Waste site in North Hykeham has generated power for 27,000 homes since 2014.
Fire crews were called to a large domestic fire on Ferrous Way, North Hykeham, on Sunday afternoon.
Work is set to start after the government confirmed £110m of funding towards the £200m project.
