Question: What would be the best way to connect two freestanding farm buildings onto the same network? The total cable length would be less than 1000 feet. Cat6 is listed as having a max length of about 330', which is too short. What other options are out there? There is no line of sight due to a slight hill between the two buildings, so a Wi-Fi boost would probably run into problems too. 

Edit: Realized I didn't say how much bandwidth I would need. The internet connection is 10/3, and internal transfers won't be huge. Anything >= 10 Mbps would be plenty.

Answer: 
In a word: fiber.

Your solution could be as simple as two [media converters](http://rads.stackoverflow.com/amzn/click/B00009B5AA) and [1000 feet of multi-mode fiber](http://rads.stackoverflow.com/amzn/click/B0000C8Y58) with matching connectors, at a cost of under $500 total for actual networking components.

You would need to plan the run carefully to prevent the fiber from being damaged during or after installation. Compared to copper, fiber is easier to break and requires very expensive tools to fix. 

Ordinarily, one would consult a professional installer.
You can try these wireless solutions:

* <http://www.trangobroadband.com/wireless-products/multipoint-broadband-access/M900S-900mhz.aspx> - Up to 20-mile range, 18 dB fade margin, 3 Mbps usable subscriber throughput
* <http://www.industrialethernet.com/aw900x.html>

If you want to go for fiber, then 100Base-FX would be enough.