A release of approximately 3.3¿1025 lithium atoms was made on September 11 and again on September 20, 1984, by the Active Magnetospheric Particle Tracer Explorers (AMPTE) Ion Release Module (IRM) spacecraft at a geocentric distance of ≈18.8 Re in the subsolar direction, creating an ion cloud approximately 4 Re in diameter after one hour. Detailed modeling of ion propagation to the bow shock and transport through the magnetosheath shows that >20% (September 11) and >50% (September 20) of the ions mapped to a 36-Re2 area around the stagnation point on the magnetopause. The AMPTE Charge Composition Explorer (CCE) satellite, located inside the magnetosphere with an apogee of 8.78 Re and inclination of 4.8¿, at a local time of about 1300 MLT, was instrumented to detect lithium ions over the energy range from a few eV to >6 MeV. Detailed analysis of the data for the several hours following the lithium releases shows that no measurable lithium ion fluxes reached the location of the CCE; upper limits to the lithium flux at L>8 are about 50 to 70 (cm2-sec-sr)-1 in the range 25--300 keV/e (Li/H>2¿10-5), and about 0.1 to 1 (cm2-sec-sr)-1 in the range 45--100 keV/nucleon (Li/H≈1¿10-6). The implications of these results are discussed in the context of current theoretical models of plasma entry into and transport within the magnetosphere.