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How long can one expect a viewshed analysis to run?

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How long can one expect a viewshed analysis to run in ArcGIS with the following parameters:

Analysis at each of 3,800 points with results added to produce a single surface result. Set up with "viewshed" tool.

Points are arrayed along a linear feature (a hiking trail) totaling approxmately 610 km (381 miles). Trail loops to form a rough oval shape.

Points spaced approximately 160 m (0.1 mile) apart.

An 8 km (5 mile) analysis extent is used for each point.

10m DEM in mountainous setting.

The analysis is running on a server (32gb RAM, 64 bit, Arc v10.1, plenty of drive space). It has been running for nearly 120 hours already.

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