Observations made with the mass spectrometer telescope (MAST) instrument aboard the SAMPEX spacecraft have previously been used to map the belt of geomagnetically trapped anomalous cosmic rays at L≈2. Here we use the heavy ion large telescope (HILT) instrument to extend these observations to lower energies, closer to the peak of the interplanetary spectrum at 1 AU, for oxygen and neon. At lower energies than observed by MAST we see a distinct peak in the oxygen spectrum at the energy corresponding to the geomagnetic cutoff for singly charged incident ions arriving from the west, at each L where that is in the HILT energy range. This is due to the suppression of the particle source at energies below the cutoff, and the subsequent filling-in of lower energies via slowing down of ions that had energies above the cutoff when originally trapped. In addition, our observations of oxygen confirm the MAST discovery that the pitch angle distribution at SAMPEX altitudes is nearly isotropic outside the loss cone, and we see similar variations with time, trends with L, and general level of trapped flux at the energies where the two instruments' responses overlap. The normalization of the trapped oxygen and neon fluxes as functions of L, when compared with previously published models, suggests more efficient trapping toward low L and/or additional losses at high L. ¿ American Geophysical Union 1996