New College Summer Residence
at the University of Toronto
Homepage: http://www.torontores.com/
Email: summer.newcollege@utoronto.ca
Phone: +1-416-946-0529
Fax: +1-416-946-3801
Ask for special rate for JRS07 / York University ($35/night for a signle room, $60/night for a double room. Both include breakfast.)
Google Map is here
Direction to MaRS Centre is here

Holiday Inn
TORONTO-MIDTOWN
280 BLOOR ST. WEST
TORONTO, ON M5S 1V8 CANADA
Phone: +1-416-968-0010
Fax: +1-416-968-7765
Ask for special rate for JRS07 / York University ($119.99/night for single occupancy, $129.99/night for double occupancy)
Google Map is here
Direction to MaRS Centre is here

You may take the subway or taxi to MaRS. The Holiday Inn is at Bloor and St. George. There is a subway station there(within 1 minute). So it is easy for you to take the subway. By walking, it takes about 20 minutes from Holiday Inn to MaRS (2 stations by subway).

U of T's New College Summer Residence is even closer to MaRS(1.2km). You can also take the subway, taxi or walking to MaRS.

You can find TTC subway information here