  Multi-parametric and analytic families of four-dimensional
$\,\textrm{AdS}_{3} \times \mathbb{R}\,$ (Janus) and $\,\textrm{AdS}_{3}
\,\times\, \mathbb{R}^{+}$ (Hades) solutions are constructed in the SO(8)
gauged supergravity that arises from the consistent reduction of
eleven-dimensional supergravity on $\,\textrm{S}^7\,$. The solutions are
generically non-supersymmetric, involve non-trivial running scalars and
preserve a $\,\textrm{U}(1)^4\,$ symmetry. Different patterns of (super)
symmetry enhancement occur upon suitable adjustment of the free parameters
which further control the boundary conditions of the running scalars. We
concentrate on the non-supersymmetric Janus and Hades solutions with
$\,\textrm{SU}(3) \times \textrm{U}(1)^2\,$ symmetry and provide their
higher-dimensional description in terms of M-theory fluxes and membranes.
Special attention is paid to a class of such Hades solutions dubbed "ridge
flows" which resemble dielectric rotations of Coulomb branch flows previously
investigated in the literature.
