The 133 SB (Laguna Freeway) connection to the 405 NB is being widened over San Diego Creek.
The San Diego Creek bike path goes under the freeway wher work is being done, so is closed just past Alton.
There is a good detour posted; upstream at the closure fence take the connector back up to EB Alton, take Alton over the 133 adn turn right on Pacifica, Turn right at Spectrum and find the other end of the closure where you can resume across the bridge sidepath and under the 405 Freeway to the Los Olivos ‘hood .
Downstream, at the closure, turn left onto Spectrum, turn left with the signal onto Pacifica, turn left with the signal at Alton (Left turn lane or 2-step box turn) and then at the San Diego Creek, resume down stream on either side of the creek.