

Update: Yup, Jake is in Leadville:

After leaving the assembly, we heard rumors of Hollywood stars in the mix. Turns out Jake Gyllenhaal of gay cowboy fame was up in the rafters in a big beard and hat. We haven’t figured out his role in this yet but the lowdown seems to be a Born to Run movie in the works. They aren’t filming the movie right now. I am thinking they are doing some scouting and maybe some “day in the life” stuff so they can then portray it in a film? Seems silly since its such an event in itself and doesn’t need to be acted in my opinion. Anyway, here is a back shot of him. He is in the hat with backpack.
And from another blogger:
Not sure what's going on with this race. I personally didn't guess that Lance Armstrong would try again, but he destroyed his own record in the LT100 bike race a week ago. Not sure why all the famous people are in town. Sitting here in the Provin' Grounds coffee shop just after the start of the LT100 run, and the star of Donnie Darko, Jarhead, Rendition, Jake G, and some other famous notables, have been sitting around the couch hunched over maps.
We know Jake is an avid runner, as well as a Bruce Springsteen fan and impersonator.

But rumor has it that Jake is in Leadville, Colorado, this weekend, attending the apparently legendary Leadville Trail 100/Race Across The Sky.

Jake is allegedly accompanying Christopher McDougall, author of "Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen. According to one blogger:
Jake Gyllenhaal was at the pre-race meeting in disguise of sorts. Actually, he blended very well with the trail crowd with a big beard. I think they are making a movie. Kind of cool.

And according to another tweeter, Jake was spotted at the Leadville 100 with McDougal scouting for a move of the book.
I know nothing about this kind of running or the author, though that tweeter doesn't seem too fond of him! Guess we'll find out pretty quickly if this is a true sighting or another case of mistaken identity - the race is scheduled to start at 2:45AM MDT!
Let's complete the post with what we know are actual Jake sightings: He was photographed by an enterprising blogger at the Chateau Marmont last week:

Here's a nice shot of Jake in Chicago for Source Code filming:

We know Jake spent much of his summer on Martha's Vineyard, where the Obamas are now. Here's Jake a few years back on the island. This was posted in February 2005. Not sure when it was taken: