The USGS map lists the height of Maple Mountain as 9089 ft.
That was before the marmots dug their hole on the summit. Just kidding. I'll get it changed. Glad to see you made it up without snow. That's a bugger. Hope to see you up there this winter. Dave Hunt and I will start making an uptrack once we get over about three feet.
I am hiking this today and may post some additional details. I have done it once before as a part of a triple peaking day (maple, y mountain, and squaw peak). We took the Northwest ridge and plodded through the snow without too much difficulty. Don't take the spur from the Bonneville Shoreline unless you're eager for some serious pain. Take the Y trail as suggested, as far as where to go from there it is a little difficult to figure out the fastest way. I will be just going straight up the side. :)
If you knew anything at all about Maple Mountain High School you would know that it was not named after Spanish Fork Peak. It was named after the section of the Wasatch mountain range that stretches from Maple Canyon to Diamond Fork Canyon,which is Maple Mountain. (Look on Google Earth).
Actually, if you knew anything at all about geography, or if you look on Google Earth, or Google Maps, you will find the mountain range between Maple Canyon and Diamond Fork Canyon contains Spanish Fork Peak, and further east is Red Mountain (there is no Maple Mountain there). If you go more north, there is Grindstone Ridge. Just as a side note: I have no idea what the high school was named after.
I have hiked all around Maple Mountain (up Slide Canyon, Down Slate Canyon, across Bonneville Shoreline Trail), but have not actually been to Maple Mountain summit or even Maple Flats. I do plan on doing it soon, though.