A cart is described for use in transporting and loading kayaks and similar watercraft. The cart includes first and second side frame members having forward and rear ends; a support member extending between the frame members adjacent the frame member rear ends; a bracing member extending between the frame members adjacent the frame member forward ends; a wheel assembly adjacent the rear ends of the frame members, the assembly including first and second axle ends and wheels carried on the axle ends; and an anti-reverse braking means preventing rearward movement of the cart upon tilting of the cart upward. The braking means may include a first component attached to a frame member and a second component attached to a rotatable component of the wheel assembly, the first and second components being moved into locking engagement upon upward tilting of the cart.