To find the value of \(\log 0.00001\), we can express \(0.00001\) in exponential form:
\[ 0.00001 = 10^{-5} \]
Now, using the properties of logarithms:
\[ \log(10^{-5}) = -5 \log(10) \]
Since \(\log(10) = 1\), we have:
\[ \log(10^{-5}) = -5 \cdot 1 = -5 \]
Thus, the value of \(\log 0.00001\) is:
\[ \boxed{-5} \]