To find the unit rate at which the turtle is crawling, we need to calculate how far the turtle travels in one hour.
Given that the turtle travels \( \frac{1}{11} \) of a mile in \( \frac{1}{3} \) of an hour, we can calculate the distance traveled in one hour by determining how many \( \frac{1}{3} \) hour intervals fit into one hour:
\[ 1 \text{ hour} = 3 \times \left(\frac{1}{3} \text{ hour}\right) \]
Thus, the turtle will complete 3 intervals of \( \frac{1}{3} \) of an hour in one hour. Therefore, the distance traveled in one hour is:
\[ \text{Distance in 1 hour} = 3 \times \frac{1}{11} \text{ miles} \]
Calculating this:
\[ 3 \times \frac{1}{11} = \frac{3}{11} \text{ miles} \]
Now, the unit rate, which describes the distance traveled per hour, is:
\[ \frac{3}{11} \text{ miles per hour} \]
Thus, the unit rate at which the turtle is crawling is
\[ \boxed{\frac{3}{11}} \text{ miles per hour} \]