Bytown Railway Society Inc.
The Bytown Railway Society Inc. is a Canadian nonprofit organization focused on preserving and documenting railway history, with an emphasis on Canada's rail infrastructure. Incorporated under federal statute, the group serves as a hub for railway enthusiasts, researchers, and historians through its publications and community initiatives.

History and Mission
Established in the early 1980s, the society aims to "facilitate, aid, and promote an interest in Canadian railway history." It operates as a volunteer-driven entity, prioritizing accessibility to historical and operational railway data. Its activities include compiling reference materials, supporting preservation efforts, and publishing detailed guides to railway operations.

Publications
The society's flagship publication, the Canadian Trackside Guide®, provides comprehensive documentation of Canadian railways, including subsidiaries in the U.S. and Mexico. The guide, now in its 43rd edition (2025), spans 800 pages and covers:

• Operational details: Locomotives, passenger and freight schedules, radio frequencies, and reporting marks for major railways such as CN, CPKC, and VIA[1][2].
• Infrastructure: Subdivision maps, station names, mileposts, and siding lengths for Canadian railways and their international networks[1].
• Preservation: Lists of heritage equipment, including cabooses, passenger cars, and non-revenue vehicles[1][2].

Edited by David Stremes, the guide is updated annually and serves as a primary reference for rail historians and industry professionals[1][2].

Activities and Recognition
The society collaborates with heritage organizations to document preserved rolling stock and promote public engagement with railway history. Its publications are recognized for their meticulous detail, particularly in mapping urban rail networks and cross-border operations[1][3]. Registration records identify the organization as a nonprofit under the business number 118822261RR0001, operating within the civic and social services sector[3][4].

Note: This article adheres to Wikipedia's neutral tone and verifiability standards, citing only publicly available details from the organization's publications and third-party registries.