You can feel it if you take the opportunity.
The Earth basking in the warmth of the longer days, the soil saturated with a season's worth of moisture.. Life is literally bursting forth, filling the brown and gray landscapes of winter with greens, yellows, blues, purples of a new season.
"Situational awareness" is one of our favorite terms. It's the same as "mindfulness" just more appropriate for when you are hanging out on a river or mountainside (and it's a little less of a "touchy-feely" term). It is a very powerful state of awareness of being which can bring comfort to someone who may be overwhelmed with all the "associated-but-not-really-important" baggage of life or work. When you are aware of your situation, mindful of your being, you are accounting for all those factors that directly and indirectly affect you... and nothing else is of consequence.
Are you breathing? Do you have water? Are you dressed in a way that will protect you from the environment? Are you protected from immediate danger? If the answer to those questions is "yes", then life is good, and you have no immediate worries.
.. and life for that moment is good.