Brrr, it’s cold out there, and even colder in the many fishable canyons of So. Cal’s San Gabriel mountains. Here’s how to have some fun:

1. Play hooky any Monday, Tuesday, Wednesday or Thursday. Skip Friday and forgettabout the weekend. There are always several thousand people who have the same idea at the same time. Crowds = lousy fishing.

2. Dress warmly in layers. Long underwear is a blessing this time of year.

3. Take it easy on the way down. Watch for gravel, sand and rocks that might give way. They will. Count on it.

4. Start with dries and move to nymphs. I know what you’re thinking: no hatch = no surface action. You might be surprised. Of the 10 fish I caught on my recent canyon adventure, two were on dries. Pick the usual suspects. Parachute Adams and his friends.

5. When you do reach into your fly box for a nymph, give that beadhead yellow sallie a try. I know it’s an underused Stone Fly, but the other eight fish I caught were all on this fly. Must be the legs.

6. Smaller is better. Even with all of our rain, flows are down. Size 14-16 or above, please.

7. Pack a lunch and extra water.

8. Bring a friend, someone who will make you laugh at some of those tiny trout you’re bound to hook.

9. Don’t wear hiking boots on slippery rocks. Just because the water’s cold, any rock in the water is still as slippery as it is in summer.

10. Turn your cellphone off. Keep your camera on. I know, you’re saying that there’s no service up there anyway. True, but it’s the principle.

11. Post your pics, so we can all see how good you look grippin’ ‘n’ grinnin’.

12. Keep an extra water and energy snack in the car.

Baker’s dozen: Get down. Get tired. Get silly. Get grateful. Repeat.

See you on the river, Jim Burns