[merak]

Taking on a mamoth or bison with a spear would be impossible. taking it on with ten spears and torches is another matter.

Best possible case, it's still a much harder way to earn a living than simply killing deer and normal game. Aside from everything else, a speared (ten or twenty spears) mammoth would be likely to die 20 miles from where you first speared it. How ya gonna carry it home?

[Burkeman1]

They wouldn't spear it. Mammoth hunts were organized and they followed herds. They killed them by digging trapps- and hearding them off cliffs. They had camps nearby to process the meat and store the excess in storage pits. Hunting smaller and faster game that don't heard in great numbers (like deer) would not have been done and most likely wasn't done until the mega fauna had been hunted out. East Coast modern American Indians didn't rely on deer hunting but had agriculture and practiced slash and burn farming when the first Europeons arrived. Deer hunting was supplimental- not a primary food source.