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.
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