The Titans clinched at least a share of the 4A Greater St. Helens League by rolling past Heritage on senior night.
Cameron Cranston had 23 points, 10 rebounds and four assists to lead Union.
Kai Gamble scored eight points. Cole Susee had five points and eight rebounds.
Sanjeet Singh led Heritage with nine points.
Union will look to secure the outright league title with a win over Battle Ground next week.
UNION 60, HERITAGE 29
HERITAGE — Jared Padley 3, Ammon Garrison 0, Keoni Peneueta 3, Michael Taras 2, Xayvier Pitre 0, Nick Morse 0, Jander Cline 8, LaTrell Johnson 2, Josh Patton 2, Sanjeet Singh 9. Totals 10 (3) 6-11 29.
UNION — Houston Combs 2, Zach Reznick 6, Tyler Combs 6, Quinn Lamey 4, Austin Lewis 1, Jalen Brown 1, Kai Gamble 8, Cameron Cranston 23, Justin Ongley 0, Jason Franklin Jr. 0, Cole Susee 5, Aiden Nellor 4. Totals 22 (5) 11-15 60.