A medium-difficulty hike to Seven Falls, for four to five hours over 9.5 miles with a 750-foot elevation gain, begins at 8:30 a.m., Friday, Nov. 23; free. Some rock-hopping is required if the water is high. Children younger than 18 must be accompanied by an adult. Call 429-4492 for reservations and information about what to bring. Visit sabinonaturalists.org
for information about other, regularly scheduled Sabino Canyon hikes.