Code:
east
You ride a young hippogriff east.
Mountain
           You are above the timberline, and can see for miles about you.
    ^^^    In the distance, you can see the lush grass of the plains as one
    ^*^    green, rippling carpet.  In another direction, you can see the
    ^^^    canopies of various forests.  It's mostly clear, hot, and there
           is absolutely no wind.  
Obvious exits: n e s w nw ne sw se
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> 
You ride a young hippogriff east.
You are forced to leave your mount behind.
Mountain
           You are above the timberline, and can see for miles about you.
    ^^^    In the distance, you can see the lush grass of the plains as one
    ^*^    green, rippling carpet.  In another direction, you can see the
    ^^^    canopies of various forests.  It's mostly clear, hot, and there
           is absolutely no wind.  
Obvious exits: n e s w nw ne sw se
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> 
It's too steep for you to climb unaided.
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> 
west
It's too steep for you to climb unaided.
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> 
look
Mountain
           You are above the timberline, and can see for miles about you.
    ^^^    In the distance, you can see the lush grass of the plains as one
    ^*^    green, rippling carpet.  In another direction, you can see the
    ^^^    canopies of various forests.  It's mostly clear, hot, and there
           is absolutely no wind.  
Obvious exits: n e s w nw ne sw se
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> 
west
It's too steep for you to climb unaided.
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> 
look west
You see mountain.
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> 
get recall shimmer
You get a blown-glass bottle of word of recall from a shimmering silken wizard's robe.
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> 
quaff recall
You quaff a blown-glass bottle of word of recall.
A circle of stones
           A vast expanse of hillside spreads out as far as the eye can
    p^h    see, covered with tall grass that has grown to the height of a
    ^*^    human's thigh.  Glimpses of the countryside can be seen between
    ^h^    lush rolling hills.  It's mostly clear, very hot, and calm.  
           
Obvious exits: n e s w nw ne sw se
     A set of rune-inscribed stones frame the center of the clearing here.
A young hippogriff appears in the room.
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> 
mount Tramp
You mount a young hippogriff, and start riding her.
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> 
If I was forced to leave my mount behind, and I can't climb mountains, then how...wha?