Hydro is an unincorporated place and former railway point in geographic Barron Township in the Unorganized South Part of Nipissing District in northeastern Ontario, Canada.

[1] Hydro is located within Algonquin Provincial Park on Grand Lake on the Barron River.

The railway point lies on the now abandoned Canadian National Railway Beachburg Subdivision, a section of track that was originally constructed as the Canadian Northern Railway main line, between Brawny to the west and Achray to the east, at a point where a still-operational Hydro One transmission line crossed the line.

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