CalTopo offers a myriad of options. Not the prettiest, but once you figure it out, it's quite functional.
Reviewing a pre-built route on AllTrails. The various map options are shown.
The Print Screen option offered on AllTrails.
Looking through trailhead options on AllTrails.
Building a route with Gaia GPS.
Reviewing areas with the many layers on Gaia. This is the tip of the iceberg.