today I took a trip up to KBAF. It’s about 2/3 the way to KLWM from my field and I wanted to practice the legs and airspace for a flight next weekend. Has nice airport. Nice on field restaurant with deck on top to eat. (That me in the middle) I filed IFR more for the practice and procedure. Got off a bit later then I would have liked-a potential error this time of year. The sky’s filled with clouds quickly. Some building cumulus. Filed for 7k quickly asked for 9. Was nice for awhile. Until I encounter this thing My path was straight at it. Most of what I encountered so far was brief turbulence. This one was different. Turbulence was moderate and like the say “ you can’t see the other side of the cloud.” It was bigger then the others. Had to turn off the autopilot. Hard to keep attitude. Very quickly asked ATC to give me a descent. Got back down to 7 and was out of it much better. Bumpy the rest of the way there in and out of the clouds. Looking back, I should have recognized that it was a building cumulus-different then the others- ask ATC to for a 20-20 degree deviation. Go around it. But I was happy I quickly realized I needed to get down and out of the more turbulent part and requested it. I sometimes fall into the “this is the line a and altitude I chose-stick with it” but today was different. Way back was a bit bumpy. Choose 6k that kept me at the bases and in the clouds a bit. But kept me away from this Overall day was a success imo. Learned, had fun, scared myself a bit. Told wife when I got back that next week when I say wheels up at 8am I mean it! Lol.