Railroad Grade Trail Professional Review and Guide
"Depending on the snow level, you can sometimes follow the trail and assorted snow-free spots up to an elevation of 7,000 feet. You may occasionally find yourself sidestepping marmots and expedition-pack-toting mountain climbers along the way; Railroad Grade is a popular approach route for folks climbing to Mount Baker’s summit. But go only as far as the snow and your comfort level allow.
Spring and fall are pleasant—just carry a sweater and/or some kind of rain-resistant jacket or shell—and summer is downright glorious. Here’s a secret: From mid-July through late September, it almost never rains, and daytime temperatures are usually in the 70s and 80s. In winter, despite the wet stuff down low and white stuff up high, it rarely gets brutally cold. Temperatures at high elevations, even in midwinter, rarely go
lower than the teens, with upper 20s, low 30s more common."