You Can't Climb City Trees in Oshawa — But Your Backyard Tree Is Fair Game

Oshawa, a mid-sized city on the shores of Lake Ontario east of Toronto, enacted By-law 78-2008 — the 'City Trees By-law' — primarily as an urban forestry protection measure. The city's street trees and park trees are maintained by the Forestry Services Department and represent a significant public asset: they reduce stormwater runoff, improve air quality, provide shade, and raise property values. The bylaw was designed to ensure that city-managed trees aren't damaged by unauthorized cutting, pruning, climbing, or the attachment of signs, ropes, and other objects that can harm bark and root systems. Tree-climbing, even by well-meaning residents, can strip bark, break branches, and introduce disease or pests. When the bylaw was picked up by 'weird laws' listicles around 2015–2016, writers sensationalized it as a total ban on climbing any tree anywhere in Oshawa — which is flatly inaccurate. Residents are not prevented from climbing trees on their own private property. The bylaw's scope is solely city-owned public land. Penalties under the bylaw are administered via the Ontario Provincial Offences Act, and Oshawa also operates an Administrative Monetary Penalty (A.M.P.) system for minor bylaw infractions. While enforcement of the tree-climbing provision specifically is essentially unheard of (the bylaw is primarily invoked for unauthorized removal or damage of city trees), the prohibition does exist in the text.