Old Guadalupe Trail is a wide, paved trail. The reason it isn't labeled an accessible trail, though, is because it goes uphill for about 0.4 miles and doesn't meet the ADA trail guidelines. However, in a power chair this is trail is fine, but for someone in a manual wheelchair, it could be quite the workout.
I also did a hike on Saddle Loop Trail. This is a 2.9-mile trail that winds around part of the mountain and has a great view of San Francisco. This trail, though, is a rough, dirt trail and traveling along it in my power chair became very bumpy at times. Power chairs with small wheels could have trouble in some places and I wouldn't recommend a person in a manual wheelchair to hike it.
I have informed the San Mateo Park Department that Bog Trail is no longer accessible. They replied to let me know that because of budget issues, they aren't able to fix the Bog Trail at this time. Bummer!
To see more of San Bruno Mountain State Park,
please watch my video.