Bit of argument on this one, think it's a 97 or 98 Avalanche, 6061 stamped on drop out anyways.... Sorry pics aren't up to much, there's a thread here viewtopic.php?f=1&t=247402 from when I first got it as a frame...
Most of mine are 93 and earlier but I do have a couple later than 98. Psyclone and Todd Well's spare Beijing frame one of the first few GT carbon mountain frames made in 2008 before they were available to the public. Will build some day.
Tiny 1998 Timberline, about to be stripped down to make way for another resto. The paint was very rough when it came to me but after a couple of weeks' tlc, although not perfect, it's now looking much tidier. Give me a shout if anyone's interested in a tiny frame and forks.