Hello, Cresha,
Only 1 day in the Bay Area? Oh, dear! There is so much to see and do.
Nevertheless....
I live in Fremont and there is one quilt shop in town.
This is the web site
http://www.sistersnstitches.com/products.html
It's in an area of offices and small businesses, near Fry's electronics (everyone in the area knows Fry's...it's a computer geeks nirvana). If you're staying at a local hotel, just ask them for very specific directions to the quilt shop, or just go to Google Maps and map it out.
While you can't spend all day at this particular quilt shop, there are other quilt shops in the area, but you would need to travel 12 - 15 miles to reach them.
A place I enjoy "visiting" in Fremont is the Niles district...several antique shops and other "funky" places to window shop. Fremont is comprised of 5 small towns that merged in the late 1950's. Niles is one of those small towns...a railroad town. It's a fun place to take a stroll.
You could also go to Central Park and stroll around Lake Elizabeth. It's a lovely spot at the foot of the hills and it has an utterly magnificent view of Mission Peak.
On the other side of town (not far) is the Don Edwards National Wildlife Preserve. It's a group of hills (not steep at all) at the edge of San Francisco Bay. The views are world-class and it's a wonderful place to walk and to enjoy all the birds. The hills are dotted with oak trees, but for the most part, it's all grass. There is a great interperative center on-site that tells you all about the natural history of the area. It's are real treat to walk along the edge of the bay! If the sky is VERY clear, and you have hiked to the top of one of the hills, you may be able to see San Francisco to the northwest. Bring a picnic lunch and you'll be a happy "day camper".
I hope you enjoy your stay in Fremont...
You should have exquisite wather...but bring a light jacket as evenings are cool.
take care,
madolyn