Fresh bottles of maple syrup bottled right at Cooke's Maple Farm on Saturday.

Melissa Kearns of Dover-Foxcroft explains how the evaporator at Cooke's Maple Farm in Brunswick boils sap into syrup on Saturday.

Sap boils down into syrup at the evaporator at Cooke's Maple Farm in Brunswick.

Steam rises from the automated maple syrup evaporator at Cooke's Maple Farm in Brunswick Saturday.

From left, Blaine Flanders, the community and donor relation coordinator for Tedford Housing; Amanda Bunker, and Kevin Bunker, a member of the Tedford Housing board, make maple taffy at Cooke's Maple Farm in Brunswick. Cooke's Maple Farm partnered with Tedford Housing, which made free taffy for visitors, with any donations going to Tedford.

From left, Harry Keates, Jonah Keates and Robin Silverman smile as Harry Keates and Robin Silverman enjoy some sticky maple taffy Saturday at Cooke's Maple Farm in Brunswick.

Harry Keates of Freeport tastes the maple taffy at Cooke's Maple Far in Brunswick on Saturday.

George Cooke of Cooke's Maple Farm in Brunswick sells maple syrup and other sweet maple products from the farm Saturday.

Upwards of 510 people visited Maple Hill Enterprises in Durham over the course of the day Saturday as part of the Maine Maple Sunday weekend.

Maple syrup popcorn samples were available and among the sweet snacks for sale at Maple Hill Enterprises in Durham on Saturday.

Andrew Bucher explains ways, old and new, used to determine if the sap is done boiling down into syrup.

Maple sap boils in a wood-fueled evaporator at Maple Hill Enterprises in Durham.

Samuel Hanson helps at Maple Hill Enterprises Saturday by loading the wood-fired evaporator with wood, keeping the fire hot to boil the sap.

Andrew Bucher talks about how the sap flows through different pans within his wood-fired evaporator as it is boiled and thickened into maple syrup.

Andrew Bucher of Maple Hill Enterprises in Durham shows the variety of maple syrup he makes. The syrup tends to darken as the season goes on, creating stronger maple flavor. The lighter maple syrup works better for making candy, Bucher said.

Maple Hill Enterprises has several types of tree taps on display at their sugar house Saturday. Andrew Bucher said the smaller taps allow the trees to heal faster and leave them less susceptible to bacteria.

Andrew Bucher has some of the early maple tree taps on display that were used by settlers from the Freeport area.