The Category Accessible Walking Groups is a subset of Walking Groups in the UK.

The Category Accessible Walks is a subset of Particular Types of Walks in the UK.

The Category Administrative Counties is a subset of Paths & Trails in UK Local Government.

The Category Architecture Trails is a subset of Particular Types of Walks in the UK.

The Category Areas of Outstanding Natural Beauty is a subset of Protected Areas in the UK.

The Category Botanic Gardens and Arboreta is a subset of Protected Areas of the UK.

The Category Boundary Walks is a subset of Particular Types of Walks in the UK.

The Category British Walking Federation is a subset of Walking Groups in the UK.

The Category Bus Way Walks is a subset of Using Public Transport.

The Category Canals and Rivers is a subset of Particular Types of Walks in the UK.

The Category Cemeteries is a subset of Protected Areas in the UK.

The Category CHA & HF Rambling Clubs is a subset of Walking Groups in the UK.

The Category Challenge Walks is a subset of Particular Types of Walks in the UK.

The Category Charity Walks is a subset of Particular Types of Walks in the UK.

The Category Christian Walking Groups is a subset of Walking Groups in the UK.

The Category City Heritage is a subset of Heritage and History.

The Category Civil Parishes in England is a subset of Civil Parishes and Communities.

The Category Coastal Walks is a subset of Particular Types of Walks in the UK.

The Category Commons Parks Gardens is a subset of Protected Areas in the UK.

The Category Communities in Wales is a subset of Civil Parishes and Communities.

The Category Community Councils in Scotland is a subset of Civil Parishes and Communities.

The Category Core Paths is a subset of United Kingdom Rights of Way.

The Category Country Parks and Estates is a subset of Protected Areas in the UK.

The Category Discovering Britain is a subset of Visitor Organizations in the UK.

The Category Disused Railways is a subset of Heritage and History.

The Category Famous Artists is a subset of Heritage and History.

The Category Famous Authors is a subset of Heritage and History.

The Category Fell & Hill Walking Groups is a subset of Walking Groups in the UK.

The Category Footpath Associations is a subset of Walking Groups in the UK.

The Category Forests is a subset of Protected Areas in the UK.

The Category Gay Outdoor Clubs is a subset of Walking Groups in the UK.

The Category Geoparks and Geotrails is a subset of Protected Areas in the UK.

The Category Guided Walks is a subset of Particular Types of Walks in the UK.

The Category Health and Wellbeing is a subset of Particular Types of Walks in the UK.

The Category Hills and Mountains is a subset of Particular Types of Walks in the UK.

The Category Historic Houses and Gardens is a subset of Protected Areas in the UK.

The Category Historical Figures is a subset of Heritage and History.

The Category Independent Walkers' Clubs is a subset of Walking Groups in the UK.

The Category Industrial Archaeology is a subset of Heritage and History.

The Category Lakes and Reservoirs is a subset of Particular Types of Walks in the UK. 

The Category Local Access Forums is a subset of United Kingdom Rights of Way.

The Category Local Government Districts is a subset of Paths & Trails in UK Local Government.

The Category Long Distance Walkers Association is a subset of Walking Groups in the UK.

The Category Maps and Mapping is a subset of Walking Publications.

The following Maps and Mapping Entities do NOT (currently) have Records in 'Open Paths and Trails'. Here, clicking on a Title of interest should link you to a relevant external Website (or Facebook Page):

- UK Grid Reference Finder

The Category Military History is a subset of Heritage and History.

The Category National Parks is a subset of Protected Areas in the UK.

The Category National Trails and Great Trails is a subset of Particular Types of Walks in the UK.

The Category Nature Reserves is a subset of Protected Areas in the UK.

The Category Nature Trails is a subset of Particular Types of Walks in the UK.

The Category Official Tourist Boards is a subset of Visitor Organizations in the UK.

The Category Outdoor Groups - Walking is a subset of Walking Groups in the UK.

The Category Parish Walks is a subset of Particular Types of Walks in the UK.

The Category Prehistoric Sites is a subset of Heritage and History.

The Category Pub Walks is a subset of Particular Types of Walks in the UK.

The Category Railway Line Walks is a subset of Using Public Transport.

The Category Ramblers Areas is a subset of Ramblers.

The Category Ramblers is a subset of Walking Groups in the UK.

A number of Ramblers Groups which do NOT (currently) have Records in 'Open Paths and Trails' are referenced in the KEY Entries of the relevant Sections of the EXPLORE categorization. Clicking on a Title of interest therein should link you to the external Website (or Facebook Page) for the chosen Group.

Naturally, as an alternative, details of a Group of interest which does not have a Record in OPT should also be accessible via the Website cited in the Record of the appropriate Ramblers Area; or, of course, by simply accessing the Website of the Ramblers Association itself.

The Category Rights of Way in England and Wales is a subset of United Kingdom Rights of Way.

The Category Sculpture and Public Art Trails is a subset of Particular Types of Walks in the UK.

The Category Spiritual Journeys is a subset of Particular Types of Walks in the UK.

The Category Tourism Promotion is a subset of Visitor Organizations in the UK.

The Category Townscape Heritage is a subset of Heritage and History.

The Category Towpath Walks is a subset of Canals and Rivers.

The Category Ulster Federation of Rambling Clubs is a subset of Walking Groups in the UK.

Details of Ulster Federation Clubs described here can be found in the EXPLORE Northern Ireland Category or, naturally, via the Website of the Federation itself.

The Category Unitary Authority Areas is a subset of Paths & Trails in UK Local Government.

The Category University of the Third Age is a subset of Walking Groups in the UK.

References to some local individual U3A Groups can be found in the appropriate KEY Records within the EXPLORE Categorization. Clicking on a Title here should link you to a relevant external Website (or Facebook Page.) Or you can simply access the main Website for the U3A itself: The University of the Third Age.

The Category Walkers are Welcome is a subset of Visitor Organizations in the UK.

A number of Walkers Are Welcome Entities which do NOT (currently) have Records in 'Open Paths and Trails' are referenced in the KEY Entries of the relevant Sections of the EXPLORE categorization. Clicking on a Title of interest therein should link you to the external Website (or Facebook Page) for the chosen Entity.

As an alternative, details of an Entity of interest which does not have a Record in OPT can, of course, be found simply by accessing the Website of the parent Walkers are Welcome organization.

The Category Walking Enthusiasts is a subset of Walking Services in the UK.

The Category Walking Festivals is a subset of Visitor Organizations in the UK.

The Category Walking Holidays is a subset of Walking Services in the UK.

The Category Walking Magazines is a subset of Walking Publications.

The Category Walking Portals is a subset of Walking Services in the UK.

The Category Walking Publications is a subset of Walking Services in the UK.

The Category Woodland Walks is a subset of Particular Types of Walks in the UK.