<div class="quoteheader"><div class="topslice_quote">Quote from: Monster Manual I, page 311</div></div><blockquote class="bbc_standard_quote">Burrow: A creature with a burrow speed can tunnel through dirt,<br/>but not through rock unless the descriptive text says otherwise.<br/>Creatures cannot charge or run while burrowing. Most burrowing<br/>creatures do not leave behind tunnels other creatures can use<br/>(either because the material they tunnel through fills in behind<br/>them or because they do not actually dislocate any material when<br/>burrowing); see the individual creature descriptions for details.</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>Okay, I looked it up and you can't.