Well I've had no problems at all at night... but my lights are blinding I actually might be scaring people away. I've seen a few sketchy people out there at night. I would be reticent to ride that trail alone at night if I was a lady.
right now my girlfriend buses it to downtown, but she want's to start riding her bike, I wouldn't want her riding out there at night alone... but she's not the most confident person on a bike, so the idea of here on the busy streets of portland skirting the river up to the hawthore bridge scares me a little. Especially with recent events involving cyclists and cars/trucks. Spring water seems like the lesser of 2 evils to me... but I wouldn't let her do it alone at night.