Historical clue formulations

• Tree-lined walk — 2019-03-03
• San Francisco Bay city — 2019-02-21
• Island in San Francisco Bay — 2017-07-21
• California's so-called "Island City" — 2016-04-15
• Oakland's county — 2010-02-22
• Tree-lined avenue — 2009-05-28
• Neighbor of Oakland — 2008-08-10
• Oakland's county — 2007-04-30
• City on San Francisco Bay — 2001-11-04
• Oakland's county — 1998-11-04
• Walk in the shade — 1997-01-18
• Public walk — 1994-12-31
• Neighbor of Oakland — 1994-10-02
• San Francisco suburb — 1994-08-07
• San Francisco Bay city — 1994-07-17