Last Wednesday, January 18th, I rode the bus up to the start of the San Clemente and Rose Canyon hiking trail shown below.
San Clemente Rose CanyonTrail profile
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I dropped down into Rose Canyon next to where the railroad tracks cross under Genesee Ave at the beginning of the 4 1/2 mile hike
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The trail is fairly flat and easy to follow.
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Just beyond the midpoint of the hike the trail crosses under Hwy 52 close to the railroad tracks. The Mid-Coast Trolley line is under construction here.
Though it wasn't marked very well when I did the hike this portion of the trail isn't technically open. But I did manage to get through.
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The hike really ended for me here at Marian Bear Natural Park. It's possible to continue on back to Genesee Ave and I-805 if your up for it. I wasn't able to flag down a bus on Regents Road so walked up to the bus stop on Luna Ave.
For a similar post about a similar hike I did back in 2013 see: