  We explore a network of electronic quantum valley Hall (QVH) states in the
moir\'e crystal of minimally twisted bilayer graphene. In our transport
measurements we observe Fabry-P\'erot and Aharanov-Bohm oscillations which are
robust in magnetic fields ranging from 0 to 8T, in strong contrast to more
conventional 2D systems where trajectories in the bulk are bent by the Lorentz
force. This persistence in magnetic field and the linear spacing in density
indicate that charge carriers in the bulk flow in topologically protected, one
dimensional channels. With this work we demonstrate coherent electronic
transport in a lattice of topologically protected states.
