http://fwp.mt.gov/mtoutdoors/HTML/articles/2008/mountaingoats.htm
John Vore hinted at snowmobiles being the problem in the Sapphires in this 2008 article. Goats in the Bitterroots were doing ok at that time. Goats in the Bob were not. Down dramatically by 2000.
I think Brown has it right, Vore's theory, like him, is a big pile of dog chit. That guy should NOT be allowed to manage even field mice, let alone a big-game animal...unless you wanted to eliminate field mice, then he's your man.
I just got off the phone with a good friend of mine, Mr. Garner, from Missoula and had a good talk with him about goats in the Sapphires.
He drew tags in 1973, 1974, and 1984 in the sapphires. He told me that in 73 and 74 the FWP issued 5 tags each year and he saw 30-40 goats in each of those 2 years, and killed one in 1974 that was 14.5 years old. He said in 1984, which he thought was the last year they issued tags in the Sapphires (still issuing 5 tags), he saw 4 goats, 2 nannies, a kid, and one small billy. He told me he hunted at least 15 days in 1984, and "covered that M-fer from one end to the other"...and knowing how he still hikes, I can imagine that in 1984, he left very few stones unturned. So, in a span of 10 years, it seems not changing anything in harvest, finally took a toll...again, no proactive management by the FWP, even clear back in the 70's and 80's.
I remember the first several years I applied for a goat tag on the West side of the Bitterroot, there were 75 tags issued good from HWY 12 to the West fork. IIRC, they split the West Fork into a different unit. I also recall that a few years, prior to splitting the units by drainage, they decreased it to 50 for a year or maybe 2. I know several of the West side drainages were completely closed and hardly any tags were issued by the late 80's. My younger brother drew one of the two goat tags issued in Kootenai Creek in 1987 and he killed the only goat we saw, a 4.5 year old billy. I quit applying for a goat tag in the 'roots in 1990.
Again, its over-harvest, conifer encroachment, habitat changes, no management, and predation...all have taken their toll on goats.