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The chasm must be descended.  The waterfall falls into a dark cave with a pond, a touch over waste depth and with a bottom of small to medium sized boulders and rocks.  It is easy to clamber down most of the way, but unfortunately, the final five metres of the chasm is both slippery and at least vertical, and probably too high to safely jump from because of the shallow water depth.  We slid down an old tree trunk that was stuck in the chasm.  It might be worthwhile bringing a rope here, in case a tree trunk is not available.

Our first attempt was aborted just after this this point.  The swell was too big and we had a serious scare when cornered by a large wave while inside a nearby cave (method of survival: "hang on very tight" seemed to work on this occasion).

The second attempt was made on a day in November with a forecast of 15 degrees, showers and possible highland snow.  We started at dawn, with mostly clear skies and low swells.

Initially the rock is a kind of mudstone perhaps: certainly it is quite loose, though at water level it is polished and even provides occassional short overhanging sections.  The climbing is mostly short and scattered in this section, but the coastline is interesting, with some large caverns and hidden coves: a particularly striking arch is encountered shortly before the bay starting Cape Surville (see pictures).  There are some short swims required.  

By the time the start of Cape Surville is reached, the rock has turned to dolerite, and there are some lengthy sections of moderately easy climbing (with some very short swims) on typical good quality coastal Tasmanian dolerite.  The point of Cape Serville itself is quite impressive, with some daunting dolerite caves capped by a some kind of very crumbly sedimentary rock/soil.  The cliffs are probably over a hundred metres at their highest.  Some moderate swims are required to pass the caves. 

At Deep Glen Bluff the rock makes a dramatically sudden change to granite: the southern most section of granite on mainland Tasmania.  The bluff itself continues for a long way, and presents some of the longest unbroken pieces of coastal traversing I've done.  In many places, the soils above the cliff seem to have leached a layer of what looks to be classic smooth limestone over the granite.  At one point this completely takes over, with no sign of the granite beneath.  One section of rock offers consistent climbing on pristine granite/limestone at around grade 15 to 17 for hundreds of metres without break.  

When the bay of Deep Glen Bay is reached, the granite takes on a different kind of character, presenting a series of sharp ribs of rock that force many short swims.  Around 7 were needed within the bay itself.  This was particularly memorable on the successful traverse, as rounding the corner to the bay (which is, ahem, deep) presented us with a biting southerly wind with blasting showers.  The base of Deep Glen Bay itself has amazing character and presence (as well some historical interest) and is a fitting place to finish this brilliant traverse.

The adventure is not yet over however: the car is now some distance away.  There is a faint track up the gully leading to Deep Glen Bay: this is very steep, but filled with beautiful forest of giant ferns, and some enormous Eucalyptus Globulus toward the top.  At the top, a fire trail is reached.  Head rightwards and then down another track that heads roughly northward back toward Cape Surville.  Follow the Cape Surville track back to the car.  The walk to Deep Glen Bay is described in several walking books, and it would be worthwhile investigating these first.

This round trip took a full morning: around 7AM to 1:30PM; we went fairly fast, doing a fast jog for the walk back.
All photos by Peter Jackson.