General tactics for water where BC's regs just say "trout/char," since one quota often covers several look-alike species at once.
Spring right after ice-off (roughly April through June) and fall (September into October) are the most productive windows across most of BC, since water temperatures sit where trout and char feed most actively and fish hold in shallower, reachable water. Summer fishing stays strong at higher-elevation lakes that remain cool, but many low-elevation lakes and rivers slow down once the water warms up. Fall lines up with bull trout and Dolly Varden spawning runs into tributary streams, so closures or extra restrictions near spawning tributaries are common in many watersheds during September and October, check the water-specific rules before fishing those areas. Winter ice fishing is a reliable option on frozen lakes through much of the Interior and north.
Early morning and evening, when light is low, produce the most consistent action, especially once summer heat pushes fish deeper or into shaded water during the day. Overcast or drizzly conditions can keep fish biting through the middle of the day as well.
Trolling a small spoon, spinner, or hoochie behind a flasher or dodger at varying depths covers the most water on lakes and works for trout and char alike, run shallow in spring and fall and add weight or line to get deeper as summer water warms. Shore anglers do well still-fishing a worm or roe bag under a slip bobber near drop-offs and stream mouths. Fly anglers take fish by suspending a chironomid or small nymph under a strike indicator in stillwater, or by dead-drifting nymphs and swinging streamers through river pools and runs. In winter, vertical jigging a small spoon or jig near bottom on frozen lakes takes both trout and char.
In lakes, work drop-offs, shoal edges, weed lines, and the mouths of inlet and outlet streams, char such as bull trout and lake trout tend to sit deeper and closer to bottom structure than rainbow or cutthroat trout do. In rivers, target pools, current seams, undercut banks, and the tailouts below riffles. Confluences where a cool tributary meets a larger river or lake are consistently productive for both trout and char across the province.
60 waters whose published rule specifically mentions trout & char (general). This isn't exhaustive, plenty of other waters hold this species too under the region's default limits without a water-specific line.