Summer Programs
SPARC
A* Summer Math and Computer Science Camps (Bay Area)
Hampshire College Summer Studies in Mathematics (Amherst, MA)
CyberMath Academy (Bay Area or Boston, MA)
Elementary School:
Epsilon Camp (Colorado)
Middle School:
High School:
Bay Area or nearby
AwesomeMath (UC Santa Cruz and Cornell University)
COSMOS (UC Davis)
SUMaC (Stanford)
Math Zoom Summer Camp (Cal Poly Pomona and Rutgers)
Abroad
Modern Mathematics - International Summer School for Students (Jacobs University, Bremen, Germany)
Elsewhere
Candada/USA Math Camp (Mount Holyoke College in South Hadley, MA)
Bright Math Camp
Summer Program for Women in Mathematics (Princeton)
Hampshire College Summer Studies in Mathematics
MOSP USA team preparation for the IMO
PROMYS (Boston University)
The Ross Program
Young Scholars Program
Research Science Institute (most advanced in research)
All Girls/All Math
International Math Summer School (Germany) (brochure)
Math Competitions:
American Math Competitions
AIME
ARML
Canadian Math Competition
International Math Olympiad
Mrandelbrot Competition
MATHCOUNTS
Pi Math Contest
Putnam Competition
USA Math Talent Search
USAMO
Math Kangaroo
ABACUS
MOEMS
North American Computational Linguistics Olympiad
The Stanford Math Tournament
ProCo - High School Programming Contest at Stanford
Institutes & Organizations:
Mathematical Sciences Research Institute
Pacific Institute for Mathematical Sciences
American Institute of Mathematics
The Clay Math Institute
American Mathematical Society
Mathematical Association of America
Math Journal:
Mathematical Reflections
Notices of the American Mathematical Society
American Mathematical Monthly
Conferences:
MSRI National Conference
AMS/MAA Conference in New Orleans