You can also see distance from the origin when you move your mouse cursor around. If you look at the measurement (X or Z position) at 1 point you'll see a measurement. Make note of that. From here, move your mouse to the other desired location and get the measurement from that. With some simple math, you should be able to figure out the distance between both points...Say that we're measuring the X-axis - location 1 was at -22ft. Location 2 at 40ft. Overall distance between those 2 spots would be 62ft. Measuring height, just like measuring the height of your track when you're laying one out.
This technique worked for me when making show buildings for my rides as I knew to make a 100x80x80 building to cover the first part of my ride.