Poet Lewis MacAdams, co-founder of Friends of the Los Angeles River, to step aside as president

Lewis McAdams walks with Marissa Christiansen through the courtyard of the Friends Of The Los Angeles River in the Elysian Valley, a few miles north of downtown Los Angeles.

Lewis McAdams at Friends of the Los Angeles River in Elysian Valley.

Children hike on the bike trail along the Los Angeles River.

The water churns and dances on the Los Angeles River as it makes its way through the the Elysian Valley.

Birds walk along the bank of the Los Angeles River a few miles north of downtown Los Angeles.

The Los Angeles River flows a few miles north of downtown Los Angeles in a lush area of the Elysian Valley.

The Los Angeles River flows under the Glendale Freeway in the Elysian Valley.

Birds thrive along the Los Angeles River a few miles north of downtown Los Angeles.

Lewis McAdams surveys the Los Angeles River in Elysian Valley.