The Hills couple couple wore matching bunny ears.
They then hit a local playground and took a ride down the slide.
Of course, their trip wouldn't have been complete without some PDA: At one point, Pratt pinned Montag up against a tree and nuzzled her neck while holding a stuffed bunny.
The pair seem to be on better terms than before.
In a recent Us Weekly cover story, Montag and Pratt opened up about how another girl came between them.
"Spencer and I have really had our ups and downs this past year," Montag told Us. "I've definitely been betrayed by friends before, but I've never had a boyfriend do this to me."
She adds, "Spencer and I may differ on what it means to cheat."
See the latest on their romance when their MTV reality hit, The Hills, returns tonight.
Revist the love lives of The Hills stars here.