  The Fermi surface of graphite has been mapped out using de Haas van Alphen
(dHvA) measurements at low temperature with in-situ rotation. For tilt angles
$\theta>60^{\circ}$ between the magnetic field and the c-axis, the majority
electron and hole dHvA periods no longer follow the $\cos(\theta)$ behavior
demonstrating that graphite has a 3 dimensional closed Fermi surface. The Fermi
surface of graphite is accurately described by highly elongated ellipsoids. A
comparison with the calculated Fermi surface suggests that the SWM trigonal
warping parameter $\gamma_3$ is significantly larger than previously thought.
