Caitlyn Jenner's gritting through the loss of her longtime friend and manager earlier this week ... getting back out into the world after the tragic ATV accident.
The reality star was spotted grabbing a cup of coffee in Malibu Thursday ... looking casual in a light blue t-shirt, knee-length shorts and dark sunglasses.
Jenner's a tough woman ... holding it together in public -- even giving onlookers a wave -- despite the recent loss of Sophia Hutchins, her 29-year-old friend and manager.
She drove off with her coffee and a big black dog leaning it's head out the window .