Allison and Skyler just moments before the fall.
Allison, then 16, fell from her horse, Skyler, and sustained a fractured skull, a severe traumatic brain injury, and bruised lungs.
She was wearing a helmet and at the time her family said they were "baffled by the extent of her injuries."
The 17-year-old is still in a coma, but is breathing on her own through a trach, and has a feeding tube. Her mother, Terri, said Allison is resting quietly and her vital signs are stable. "Because of the extensive injury to her brain, we don't know what the future holds, so we would greatly appreciate your prayers for her healing."
Yesterday morning Allison opened her eyes at 6am and kept them open until about 9.30. "Afterwards she was sleepy the rest of the day," Terri Angrove said. "She slept through her Reiki healing session."
Messages of support and prayer are read to Allison, who is now at Santa Clara Kaiser Hospital. Hundreds of supporters have signed Allison's guestbook.
Her family is looking for a suitable care facility for Allison once she is discharged from hospital.
A fund-raiser is being held for Allison at the Ram Tap Horse Trials, on May 1-2.