Mars Exploration Rover Mission
http://marsprogram.jpl.nasa.gov/mer/
The Jet Propulsion Laboratory's website for the Mars Exploration Rover Mission where you will find the current status of the spacecraft.

Athena Mars Exploration Rover
http://athena.cornell.edu/
The Mars Exploration Rover science instruments website where you will also find journal updates from Steve Squyres, Athena Science Team Principal Investigator.

2001 Mars Odyssey Mission
http://marsprogram.jpl.nasa.gov/odyssey/
The Jet Propulsion Laboratory's website for the 2001 Mars Odyssey Mission where you will find the latest information and images from the mission.

Mars Global Surveyor Mission
http://marsprogram.jpl.nasa.gov/mgs/
The Jet Propulsion Laboratory's website for the Mars Global Surveyor Mission where you will find the latest images and information about the mission.

Past Missions to Mars

Mariner 4
http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1964-077A
The Mariner 4 website which explains the mission and what was discovered.

Mariner 4 (images)
http://nssdc.gsfc.nasa.gov/imgcat/html/mission_page/MR_Mariner_4_page1.html
Images of Mars from the Mariner 4 mission.

Mariner 9
http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1971-051A
The Mariner 9 website which explains the spacecraft, subsystems and the mission.

Viking Project
http://nssdc.gsfc.nasa.gov/planetary/viking.html
Mars images from the Viking Project.

Mars Pathfinder Mission
http://mpfwww.jpl.nasa.gov/default.html
This page takes you to the Mars Pathfinder websites on the day of the landing on Mars and at the end of the mission.

Mars Pathfinder Mission - Sojourner
http://mpfwww.jpl.nasa.gov/MPF/mpf/rover.html
The website for the Mars Pathfinder's rover, Sojourner.

Mars Climate Orbiter
http://mpfwww.jpl.nasa.gov/msp98/orbiter/
The website for the Mars Climat Orbiter which was lost on September 23, 1999.

Mars Polar Lander
http://mpfwww.jpl.nasa.gov/msp98/lander/
The website for the Mars Polar Lander which was lost on December 3, 1999.

Deep Space 2
http://mpfwww.jpl.nasa.gov/msp98/ds2/index.html
The website for the Deep Space 2 probes which were on board the Mars Polar Lander and scheduled to be launched right before the Mars Polar Lander entered the Martian atmosphere. The microprobes were lost along with the lander on December 3, 1999.