Mossie, The 450 could do this, However, getting down the ravine, (and back up) may be a problem.
do you have a plan to get un-stuck? my 450 is currently 3' deep in saturated loam 5 feet from the edge, w/o a winch. Have to wait for some drier weather.
Most track loaders have the semi grouser shoes on them and are not very agressive that + weight = sink city....sl