The annual event is this year celebrating its nonacentennial.
The 2025 festivities got under way on Saturday (May 3), with Boston Borough Council mace bearer Andy Lamming performing the traditional proclamation.
The fair will remain in town until Sunday.
It opened today at 11am and will close at 10pm.
It will be open from 3-10pm tomorrow, Wednesday, Thursday and Friday, from 11am to 10.30pm on Saturday, and from 11am to 8pm on Sunday.
On that Sunday, from 11am to 1pm, a quiet and sensory session will be held. During these times, the fair music and lights will be turned off.
5. Opening of Boston May Fair 2025
Maisie Lenton, 14, (left) and Maisie Barker-Lakin, 15, of Boston. Photo: D. R Dawson Photography
6. Opening of Boston May Fair 2025
Lula Mellors, five, and Alice Francis, one, of Boston. Photo: D. R. Dawson Photography
7. Opening of Boston May Fair 2025
Alice Turcu, five, of Boston. Photo: D. R. Dawson Photography
8. Opening of Boston May Fair 2025
Lexie Knight, 18, and Roman Houldin, four, of Kirton. Photo: D. R. Dawson Photography