Submitted by SP user utahguy058:
The Fee to go up American Fork Canyon is now 6 dollars, and not 3 dollars like stated under the red tape section.
The first campground encountered when driving up American Fork is the Little Mill campground. Little Mill is located approximately 1.5 miles beyond the Timpanogos Cave visitor’s center. The campground parallels the road, as well as American Fork Creek. There are 66 campsites and numerous picnic areas. The sites are rather cramped, quite a few of them are located very closely together. Each site is $11.00 per vehicle.
If you continue Northeast on 144 you’ll come to Tibble Fork Reservoir. A paved road leads from Tibble Fork to the Granite Flat campground. Granite Flat features 64 individual sites and several group areas. For the most part the campsites are fairly spacious and well spaced. The individual campsites are $11.00 per night.
Geologic cross section A-A' of Box Elder Peak anticline, a compound structure comprised of two superposed anticlines and the product of five structural phases: 1) lateral ramps developed in hanging wall of Charleston-Nebo thrust in Jurassic-late Cretaceous time, 2) folding of the C-N allochthon during late Cretaceous (Campanian)-middle Eocene construction of Cottonwood arch (Uinta allochthon), 3) late Eocene-early Miocene extensional reactivation of C-N thrust plane by faults of the Deer Creek detachment fault system, 4) late Oligocene intrusion of Little Cottonwood stock, and, 5) late Eocene-Recent flexural-isostatic exhumation related to Cottonwood core complex. Hanging wall extension is tiered with slip along curved, reactivated sole thrust responsible for structural development of Box Elder Peak rollover anticline, and American Fork crestal collapse graben related to subsidiary normal faults rooted to reactivated C-N thrust imbricate. Based on mapping by Baker and Crittenden (1961). Subdivisions of Proterozoic Big Cottonwood Group (pCs) and Mississippian undifferentiated (Mu) abbreviated: Ybc, Big Cottonwood Formation; Ymf, Mineral Fork Tillite; Ym, Mutual Formation; Ml, Gardison Limestone, Deseret Limestone, and Humbug Formation; Mbg, Great Blue Limestone.