Portable skating rink

A rectangular portable ice skating rink comprising:

• a plurality of elongate rectilinear rigid curb structural members;
• and
• a rectangular liner of flat flexible sheet material joined with seams, the liner comprising:
• a rectangular flat bottom sheet having a four sided peripheral edge;
• four elongate peripheral curb sleeves each having a vertical inward side extending from an associated side of the bottom sheet edge to form an upstanding rectangular curb with four vertical corner seams defined by intersection of the vertical inward sides of adjacent sleeves, each sleeve having an open first transverse end adapted to permit the longitudinal sliding insertion and removal of an associated elongate rectilinear rigid curb structural member, and a second transverse end adapted to permit abutting right angle corner engagement of a forward planar end of the associated rigid curb member with an inside planar side of an adjacent rigid curb member;
• and
• wherein the material and seams have resistance to water penetration sufficient to retain a pool of water covering the bottom sheet during freezing in outdoor conditions.