Tip of the Week: Mow Tips for swinging through a boulder field. Typically in May, as soon as our trout come off spawn they tend to inhabit boulder fields where they can get cover, food and good oxygen. It is hard to cover a boulder-field with a uniform sink tip as your streamer either gets caught on the boulder or it glides over “the juice” where we want it to drop in. This is where a RIO MOW TIP comes in handy! The MOW tip(product tagged in video) allows a 5ft sharp angle of your tip to dive in