  The R software package excursions contains methods for calculating
probabilistic excursion sets, contour credible regions, and simultaneous
confidence bands for latent Gaussian stochastic processes and fields. It also
contains methods for uncertainty quantification of contour maps and computation
of Gaussian integrals. This article describes the theoretical and computational
methods used in the package. The main functions of the package are introduced
and two examples illustrate how the package can be used.

Computation