Keiths:Willunga Hill and Mount Coot-tha
From SinclairWIKI
While at was at the Tour Down Under in 2009, I walked from Willunga to the top, and when my cycling friends asked me how hard it was, I said that I thought three laps of Mount Coot-tha was probably like 2 laps of Willunga Hill. So I thought I would look into it.
So looking at the gradients of Willunga Hill and comparing them to Mount Coot-tha. I was surprised to find that the gradient of Coot-tha was steeper then Willunga, and in fact if you take into account the quarry climb, Coot-tha could be harder.
Using Google Maps and "Path Profiler", I found the following:
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Willunga Hill
From the center of Willunga at the intersections:
35.271757° S 138.55427° E 120 m 139° 2.1 km 2 total 155 m (7.2%) 155 total 35.285228° S 138.568711° E 275 m 124° 1.3 km 3 total 99 m (7.4%) 254 total 35.290605° S 138.578389° E 374 m
Mount Coot-tha Quarry
Mount Coot-tha is a circuit, so you can go the back way, longer but not as steep and the front way. To warm up there is a short climb past the quarry, its
27.474424° S 152.977216° E 37 m 286° 0.5 km 0 total 37 m (8.1%) 37 total 27.47332° S 152.972775° E 74 m
Mount Coot-tha Back Climb
The Back way starting from the turn off for the Falls carpark is 2.4km at 8.4%
27.465544° S 152.96594° E 80 m 277° 2.4 km 2 total 201 m (8.4%) 201 total 27.463422° S 152.947057° E 281 m
If we do that as two segments, its 1.2km at 7.1% and 1.2km at 9.8%
27.465544° S 152.96594° E 80 m 282° 1.2 km 1 total 84 m (7.1%) 84 total 27.463859° S 152.956778° E 164 m 273° 1.2 km 2 total 117 m (9.8%) 201 total 27.46345° S 152.947057° E 281 m
Now if we add in the Quarry to the Back way, 4.1km at 5.9% (don't forget the 2.4km at 8.4%)
27.474481° S 152.977731° E 37 m 292° 4.1 km 4 total 244 m (5.9%) 244 total 27.463441° S 152.947025° E 281 m
Mount Coot-tha Front Climb
The front climb is 1.7km at 7.8%
27.47332° S 152.972925° E 67 m 226° 1.7 km 2 total 135 m (7.8%) 135 total 27.483581° S 152.960844° E 202 m
The front climb as two segments, is 0.9km at 8.1% and 0.9km at 7.3%
27.47332° S 152.972925° E 67 m 233° 0.9 km 1 total 72 m (8.1%) 72 total 27.477775° S 152.966337° E 139 m 220° 0.9 km 2 total 63 m (7.3%) 135 total 27.483619° S 152.960823° E 202 m
Now if we add in the Quarry to the Front way, 2.2km at 7.4%
27.474481° S 152.977731° E 37 m 239° 2.2 km 2 total 165 m (7.4%) 165 total 27.4836° S 152.960908° E 202 m
