Mountains, high places, places guarded by lions, and places with caves, I think they symbolize the dreamer's spiritual world, heart, or subconscious.
Friends, a part of your personality, and later figures: parents, grandparents, representing a part of the dreamer's personality.
Snakes generally represent danger and can also represent men.
She saw that the rattlesnake was injured and tried to stop the bleeding, but she was bitten by her own hand. This reminds me of a plot, a disguised conspiracy, and being victimized by a disguised conspiracy.
Some inner personalities are hurt, lost in the subconscious, and others go up the mountain to look for them. But the mountain was blocked by lions. The lion here can symbolize bad mood and pressure, and of course it can also represent things that others can't explain, only the dreamer knows. The story of being chased by a lion can be explained as that you are influenced by bad emotions. Besides, the danger is still around you.