Are there any standard systems for overland travel in Chaosium BRP or any of the related games? I know that Elric has good stuff for ships (which will be included in Magic World), and I think Runequest may have had something. Harnmaster, which is very BRP-like, has the Pilot's Almanac. But off the top of my head I'm not aware of anything which adds good detail and systems for over land travel.
To give an idea of what I'd look for, the early editions of D&D had some great stuff in terms of hexcrawl-oriented rules in the White Box, AD&D 1e DMG, and IIRC some parts of the B/X and BECMI/Rules Cyclopedia. Dragonquest (SPI) also had some useful stuff in terms of giving concrete overland movement rates and relating them to terrain, encumbrance, and fatigue.
Other important factors I'd look to cover include:
Cost & usage of supplies
Carrying capacity/encumbrance not only of humans but also of mounts, conveyances, and beasts of burden
Living off the land
Detection & evasion
Pathfinding and getting lost
Again, I'd most prefer to know about any official BRP publications that cover these areas; next best would be fan works and systems closely related to BRP (such as HM and RQ/Legend). Of course I'd also welcome pointers to other games whose systems could be adapted. Thanks in advance!