How to measure parastic capacitance of a trace
There is a way to measure the impedance of a trace which requires transmission line theory. 

But usually is only considered if the wavelength is comparable to the board size and for 24Mhz is approximately
$$\lambda = \frac{c}{f} = \frac{3\times10^8}{24\times10^6}=12 metres$$

so any reflection of that wavelength is going to be virtually nothing on a trace thats a cm or 2. 

Lets first assume that your traces are lossless which is safe assumption for low power traces.
so our propagation constant is given as
$$\beta=\omega\sqrt{LC}, \omega=2\pi f$$ which is related to wave length by $$\lambda=\frac{2\pi}{\beta}$$ anyway by the magic of the telegrapher equations derived by Oliver Heaviside we get the characteristic Impedance of$$Z_0 = \sqrt{\frac{L}{C}}$$ Which is impedance per unit length so how do we find L and C? Answer: dimensions

Mind you this is extremely simplified and only rule of thumb

Image below is a crossection of PCB track



$$L=\frac{\mu d}{w}\rightarrow\mu = 4\pi \times10^{-7}$$
$$C=\frac{\epsilon w}{d}\rightarrow\epsilon = 8.85\times10^{-12}$$

This is PER METRE so multiply this by how long your track is IN METRES

$$ 8.8mm = 8.8 \times 10^{-3} $$

The u looking greek letter mu is the permeability of free space in Henrys per metre.

The e looking greek letter epsilon is the permittivity of free space in Farads per metre.