Portable sections for dog race track

Apparatus for use as a race track comprising at least one fixed section having a pair of ends in spaced relationship with one another, said fixed section including a first racing surface thereon, at least one portable section having opposite ends and top and bottom surfaces, said top surface of said portable section including a second racing surface which is normally substantially aligned with said first racing surface when said fixed and portable sections are in an aligned position in end-to-end relationship, power means for moving said portable section selectively between said aligned position and a second position remote from said fixed section, a reinforced ledge means at each end of said fixed section, positioning and stop means located adjacent each end of said fixed section and extending outwardly substantially toward one another, said positioning and stop means having a generally planar bearing plate and an angularly disposed abutment means which is disposed generally diagonally across said bearing plate and at an angle to the path of movement of said portable section, skid means carried by each end of said portable section in a position to slidingly engage said abutment means as said portable section is moved toward said aligned position with said ends of said fixed section so that said portable section will be longitudinally aligned relative to said fixed section and a portion of said bottom surface of said portable section will be in engagement with each of said ledge means when each of said skid means of said portable section is in engagement with the adjacent abutment means, and means to lock each of said skid means to said abutment means when said skid means initially engages said abutment means so that when only one of said skid means initially engages one of said abutment means said portable section is moved lengthwise as said one skid means is slidably guided along said abutment means until the other skid means engages the other abutment means at which time the ends of the portable section are in alignment with the ends of said fixed section and locked thereto.