On the far side of the Río Copán valley is Stela 10, another mountaintop stela, which lines up with La Pintada [1] during the spring and fall equinoxes. Covered with glyphs, some of them badly eroded, the stela stands about 2.5 meters high.
To get to Stela 10, drive or walk 4.5 kilometers from Copán Ruinas [2] on the road to Guatemala, and look for a broad, well-beaten trail heading uphill to the right, which leads to the stela in a 10-minute hike. This stela can be easily found without a guide.
For those without a car, catch a ride to the trail turnoff with one of the frequent pickup trucks to the Guatemalan border.
Links:
[1] http://www.moon.com/destinations/honduras/western-honduras/copan/the-ruins-copan/la-pintada
[2] http://www.moon.com/destinations/honduras/western-honduras/copan-ruinas