Oxford Spanish Dictionary
espero te sea útil

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Note added at 24 mins (2005-08-15 14:39:35 GMT)
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Some expressions that mean a long but indefinite time
http://www.phrases.org.uk/bulletin_board/19/messages/537.htm...

Spanish term (edited): más largo que esperanza de pobre

"As long as a well rope"

Oh Say
Let the Sayings of Ireland be your guide! There's anger in an open laugh. ... As long as a wet Sunday. As old as the hills. As bald as a buailtin ...
www.ncf.carleton.ca/~bj333/HomePage.saids.html

Irish Sayings
As long as a wet Sunday. It's hard to teach an old dog to dance. As the cock crows, the young bird chirps. To be old and decayed dishonors no-one ...
http://irish.spike-jamie.com/sayings.html

Hope it helps!



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Note added at 1 hr 0 min (2005-08-15 15:16:14 GMT)
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Of course, it might be used as \"longer than a wet Sunday/weekend\".

Saludos/Regards!

Otra opción sería sería acudir a un giro de otros refranes y traducir de acuerdo al término existente (esperanza de pobre). Algunos ejemplos:

The bond with a true dog is as lasting as the ties of this earth will ever be." (Konrad Lorenz)
www-hsc.usc.edu/~rneville/sayings.html

The punishment of evil men is as lasting as the happiness of righteous souls (see
Mt. 25:46). Note Paul’s contrast between “eternal” and “temporal” in 2 ...
www.christiancourier.com/notes/jwHell.htm

... and drift into imaginary worlds as vivid as the glare of the sun on an idyllic
beach and as lasting as the stickiness of my palms after a popsicle. ...
www.browndailyherald.com/news/2004/ 09/10/Columns/The-Death.Of.Summer-715440.shtml

"Happiness
as vast as the southern sea; longevity as lasting as the southern mountains. ...
www.thingsasian.com/goto_article/article.844.html -

... Eat, drink, be merry; crown yourselves with flowers; About as lasting as the
heads they garland;; And snatching what you can of life's poor feast, ...
www.monologuearchive.com/c/calderon_013.html

Spanish term (edited): más largo que esperanza de pobre

Another option might be "...an Alaskan winter"

(I'll spare you the rest of the full registered names, which can go on longer
than a Siberian winter.) Next came Abby, 1 ½, already working toward a ...
www.jsonline.com/news/wauk/apr05/319992.asp - 58k - Cached - Similar

Logan Chambers
Pillar-lined and longer than a Siberian winter, these massive tributes to the
beauty of gray concrete were an imposing presence on the pedestrians of the ...
www.queensu.ca/aiesec/Exchange/logan.html - 62k - Cached - Similar

Seeded nineteenth, the odds against her were as long as a Siberian winter.
“There was no pressure on Amber, that’s for sure,” said Fry. ...
www.iup.edu/publications/ iupmag/backissues/Fall01/track.shtm -

The walking seems to go on longer than an Alaskan winter. Doesn't juggling in the street qualify as an important enough crime to merit a police car, ...
www.juggling.org/jw/87/1/ramblas.html - 7k - Aug 13, 2005 - Cached -

Had Oklahoma actually done something with those turnovers, the game would have seemed longer than an Alaskan winter for the Panthers. ...
www.soonerfamily.com/phpBB2/viewtopic.php?t=942& view=next&sid=be2c0110aeef84803df41aa17fc6e460