The deadline for online entry of item for the Alameda County Fair is April 25.
Information about youth contests can be found here:
http://annual.alamedacountyfair.com/youth-competitions/#
When the online entry is available, that can be found here:
http://alamed.fairwire.com
If you have questions, you can email entries@alamedacountyfair.com or call 925-426-7611.