California is big enough that there is fresh-stocked trout water somewhere in the state almost every month of the year. The trick is knowing where, because the stocking calendar rolls around the state with the seasons. As the lowland lakes warm up and shut down for summer, the mountains thaw and come alive, and the whole thing reverses in fall. Here is the month-by-month picture, broken down by region, so you always know which direction to point the truck.
One rule explains the entire calendar. Trout need cold water, so CDFW stocks each region when its water is cold enough to hold fish. Low elevation means a cool-season fishery. High elevation means a warm-season one. Keep that in mind and the months below make sense.
The Four Regions
Before the calendar, know the players. Southern California lowlands are the LA basin, Orange County, the Inland Empire, and San Diego county lakes, all stocked in the cool months. The Central Valley and foothills follow a similar cool-season pattern. The Sierra Nevada, including the famous Eastern Sierra, is a high-country warm-season fishery that opens late. Northern California and the coast run a mix, driven by local water temperature and access.
January and February
Peak season for the lowlands. Southern California and Central Valley lakes are cold, and CDFW is stocking them hard. This is prime time around LA, the Inland Empire, and the valley. The mountains and the Sierra are buried in snow and dormant. The lowest mountain lakes, like Lake Gregory in the San Bernardinos, start to come on toward late winter.
March
The lowland season is still strong, and the foothills fish well. Water is starting to think about warming in the southernmost lakes, but March is still a very good month down low. The high country is still locked up.
April
A turning point. The lowland lakes begin to taper as water warms, especially by late month. Meanwhile California's general inland trout season opens on the last Saturday in April, and the Sierra and Eastern Sierra come alive as roads open and high-country water warms enough to plant. Mountain lakes start their season around now.
May
The handoff is on. Southern California lowlands are mostly done for trout as they warm toward summer. The mountains and the Sierra are ramping up fast. The highest lakes, like Green Valley in the San Bernardinos, begin their May-through-September run.
June, July, and August
High-country prime time. The Sierra, the Eastern Sierra, and the mountain lakes are the place to be, with cold water and steady plants. The lowlands are warm and off the trout menu, having flipped to bass and catfish. Note the two Free Fishing Days that fall in this stretch, July 4 and September 5 in 2026, when no license is required. Fish early and high, because even up in the mountains the afternoons get warm.
Find the fresh fish, wherever they are this month
The active region changes with the calendar. Filter the live CDFW map for trout to see exactly which waters got stocked this week, lowland or high country.
Open the live mapSeptember
The Sierra and mountain lakes are still going, though the highest waters like Green Valley begin to wrap up their season as nights cool. The second Free Fishing Day lands on September 5. Down low, the lowland lakes are not quite ready yet but the fall transition is close.
October
Transition month. The high country winds down as the first cold nights arrive. Big Bear and the mid-elevation lakes fish a strong fall bite. Toward the end of the month, the Southern California lowlands begin their fall stocking as water finally cools back into trout range.
November
The lowlands wake back up. Southern California and Central Valley lakes ramp up again as the cool season returns, and this is when the put-and-take season really restarts down low. Many Sierra trout streams close around November 15 under the general season rules, though plenty of lakes stay open year-round. The mountains are cooling toward their winter dormancy.
December
Lowland peak resumes, complete with holiday plants at popular family lakes around Southern California and the valley. The mountains are mostly done for the season except for holdover fishing at deep lakes like Big Bear. The calendar has come full circle, ready to start over in January.
The Short Version
Fish the Southern California and Central Valley lowlands from roughly November through April, with deep winter as the peak. Fish the Sierra, the Eastern Sierra, and the mountain lakes from late April through early fall. Use the shoulder months, April through May and October through November, to follow the handoff between them. And whatever the month, confirm a recent plant before you go. The season tells you the region, but a fresh truck tells you the lake. Check both on Fish Stocking Alert and you will stay on fish all year.