You don’t have to plan from scratch. These rides pass close to Westbank, mapped and written up by route publishers around BC. The full maps and turn-by-turns live on their sites.
Fur Brigade Trail— Let's Go Biking · 43 km ride, passing about 1 km away
West Kelowna— Let's Go Biking · 40 km ride, passing about 2 km away
Getting there with a bike: province-wide buses, ferries, and shuttles are listed under Transport (some serving Westbank may be listed there rather than here).
