Hiked up to Jack Mountain via the Vault Mine Trail and the Agua Caliente Trail, and returned using the Agua Caliente Trail and the Old Baldy Trail. Great hike! There were amazing views off of the Vault Mine Trail. It was very steep, but it's very soft (by SE AZ standards). There were long stretches of fairly deep snow along the Agua Caliente Trail. The summit of Jack offered an incredible 180 degree view to the E and S.