I'm trying to trim about 400 lines to an irregular shape.  However, the trim command seems to only allow me to do one at a time.  Since it takes my computer 3-4 seconds to do each trim, and I need to redo this task 3 more times, is there an easier way?

I have a hunch there isn't, so is there another way to constrain the ends of the line to the shape quickly?

Thank you for your help!