Nineteen providers — ten nature-reserve sites managed between the National Trust and Alderney Wildlife Trust, plus nine active-adventure operators: four multi-activity outfits, three wildlife and coast boat-tour operators, a surf school, kayak-and-paddleboard hire, and an adventure golf course. The oldest dates to 1960; the newest opened in 2018. —
Nine sites and operators — four on Alderney, anchored by the Channel Islands' only wildlife trust and three National Trust holdings.
Four operators across the Bailiwick — three multi-activity providers and one dedicated Alderney Wildlife Trust hire at Braye Bay.
Three providers, all multi-activity — Outdoor Guernsey (2006), Adventure Sark (2010), Go Guernsey (2015). None coasteering-only.
Three providers, none pure SUP — a multi-activity firm, a Vazon surf school, and the Alderney Wildlife Trust's Braye Bay kayak hire.
Three walking sites — a 2001 reservoir loop at St Saviour and two National Trust clifftop stretches in Forest and Torteval.
One firm per niche, picked for editorial depth.
Conservation charity & tour operator — the only wildlife trust in the Channel Islands
Outdoor activity provider & longest-established bike hire — coasteering, kayaking, and e-bike tours
Adventure activity provider — coasteering, kayaking, climbing, and more.
Equestrian centre and tack shop — lessons, hacks, livery, supplies
Award-winning surf school with Beach Lifeguard instructors; lessons, camps & SUP hire
Nature trail around St Saviour's Reservoir; wildlife spotting and outdoor learning
Outdoor activity provider — coasteering, kayaking, archery, team building.
Channel Islands' only airsoft wargaming site & shop; nearly 30 years' experience with combat games
Diving centre & retail shop; PADI/TDI training, cylinder fills, workshop
Surf & skate shop; clothing, shoes, wetsuits, accessories, hardware
12-hole pirate-themed adventure golf by City Golf (UK) — shipwrecks, volcanoes, moving obstacles
Coastal cliff walk and climbing site — National Trust managed paths.