  For any elliptic K3 surface $\mathfrak{F}: \mathcal{K} \rightarrow
\mathbb{P}^1$, we construct a family of collapsing Ricci-flat K\"ahler metrics
such that curvatures are uniformly bounded away from singular fibers, and which
Gromov-Hausdorff limit to $\mathbb{P}^1$ equipped with the McLean metric. There
are well-known examples of this type of collapsing, but the key point of our
construction is that we can additionally give a precise description of the
metric degeneration near each type of singular fiber, without any restriction
on the types of singular fibers.
