BETHEL — The annual Source to the Sea will begin Friday, July 8, at the Lake Umbagog National Wildlife Refuge on the Magalloway River north of Errol, N.H.

The 170-mile paddling adventure down the Androscoggin River — Lake Umbagog in New Hampshire to Merry Meeting Bay in Brunswick — is hosted by the Androscoggin River Watershed Council of Bethel.

Each year, hundreds of paddlers join for one or multiple days to celebrate the river’s rebirth. Participants learn about local conservation, history, ecology and recreation through daily on-river programs. This is an opportunity to view eagles, osprey, loons and other wildlife.

The daily schedule and preregistration are available at androscogginwatershed.org. Preregistration is strongly encouraged for logistical and safety reasons. Although there is no fee to participate, a $10 to $20 donation is suggested at registration. Donations of any amount will also be accepted at the launch site on each event day. All donations support the administrative costs to coordinate the Source to Sea and other ARWC projects.

For more information, contact Becky Secrest at 207-754-8158 or 207-824-3813 or 207-318-4217, or email beckys@oxfordnetworks.net or trek@androscogginwatershed.org.

2016 Annual Source to Sea schedule

Friday, July 8: Evening Paddle Wildlife Refuge to Steamer Diamond on Route 16 in Errol, N.H., 3 p.m.

Saturday, July 9: Whitewater run from Mollidgewock in Errol to 7 Islands Bridge in Dummer, 8:30 a.m.

Sunday, July 10: Pontook Family Day/Pontook Dam in Milan to Bofinger in Dummer, 8:30 a.m.

Wednesday, July 13: Shelburne, N.H.,  to Gilead, 8:30 a.m.

Thursday, July 14: After Hours Paddle Nansen Wayside Park in Milan, N.H., to Berlin, N.H., 5 p.m.

Friday, July 15: Gilead to Bethel, 8:30 a.m.

Saturday, July 16: Bethel to Moran’s Landing in Newry/Patriot Renewables tour, 8:30 a.m.

Sunday, July 17: Hanover to Rumford, 8:30 a.m.

Thursday, July 21: Hike Whitecap Mountain in Rumford, 8:30 a.m.

Friday, July 22: Mexico to Dixfield, 8:30 a.m.

Saturday, July 23: Dixfield to Canton, 8:30 a.m.

Sunday, July 24: Livermore Falls to Twin Bridges in Turner, 8:30 a.m.

Thursday, July 28: After Hours Paddle at Otis Mill in Jay, 5:30 p.m.

Friday, July 29: Twin Bridges to Center Bridge in Turner, 8:30 a.m.

Saturday, July 30: Center Bridge in Turner to Cherry Pond in Greene, 8:30 a.m.

Sunday, July 31: Auburn to Rancourt Preserve in Lewiston, 8:30 a.m.

Thursday, Aug. 4: Auburn After Hours Paddle, 5:30 p.m.

Friday, Aug. 5: Durham to Lisbon Falls, 8:30 a.m.

Saturday, Aug. 6: Topsham to Brunswick, 8:30 a.m.

Sunday, Aug. 7: Brunswick/Merrymeeeting Bay Water Street in Brunswick, 9 a.m.