. for the roman settlement see calleva atrebatum . this article has multiple issues . please help improve it or discuss these issues on the talk page . learn how and when to remove these template messages the topic of this article may not meet wikipedia s notability guidelines for companies and organizations . please help to establish notability by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond its mere trivial mention . if notability can not be established the article is likely to be merged redirected or deleted . find sources calleva news newspapers books scholar jstor free images november 2009 learn how and when to remove this template message this article is an orphan as no other articles link to it . please introduce links to this page from related articles ; try the find link tool for suggestions . august 2012 this article includes a list of references but its sources remain unclear because it has insufficient inline citations . please help to improve this article by introducing more precise citations . november 2009 learn how and when to remove this template message a major contributor to this article appears to have a close connection with its subject . it may require cleanup to comply with wikipedia s content policies particularly neutral point of view . please discuss further on the talk page . november 2009 learn how and when to remove this template message learn how and when to remove this template message calleva inc. type non profit founded 1994 in darnestown maryland founder alex markoff headquarters poolesville maryland area served washington d.c. montgomery county maryland potomac & great falls virginia services summer camp outdoor education private programming website calleva.org calleva is the largest outdoor education organization in central maryland united states established to provide outdoor team building opportunities for groups such as schools and companies and to take groups of individuals on excursions throughout maryland virginia and west virginia . contents 1 history 2 programs 2.1 programs 3 locations 3.1 riley s lock 3.2 markoff s farm 3.3 seneca barn 3.4 adventure island 4 see also 5 references 6 external links history edit calleva was owned by nick and alex markoff whose family was involved in the summer camp business for generations . in the fall of 1993 in order to raise capital they held the first ever markoff s haunted forest . camp calleva began in the summer of 1994 . in 1997 programs for schools became available throughout the entire year offering natural history and group challenge courses . they also offered week long high adventure programs during the summer . in 1998 the first ever calleva challenge was held a triathlon of sorts on the potomac river . this was later renamed the potomac challenge in 1999 . programs edit calleva offers outdoor programming . they use a fleet of buses that can make pickups virtually anywhere in central maryland and bring people to the activities . they have a staff that has been certified to take people on outdoor activities . programs edit kayaking whitewater rafting horseback riding backpacking mountain biking caving rock climbing canoeing fishing mountain boarding surfing sailing ropes course grunkan s adventures growing green also available is the calleva ski club during the winter and the lit leadership in training program during the summer . locations edit riley s lock edit 13015 riley s lock rd. poolesville md 20837 the main office of calleva the hub of camp calleva where calleva s maintenance facility and bus fleet are located . it sits adjacent to the potomac river and the c & o canal . markoff s farm edit 19120 martinsburg rd. dickerson md 20842 the 168 acre 0.68 km2 farm is the home of markoff s haunted forest and ceep calleva equestrian educational programming horseback riding and calleva s agricultural tourism program . seneca barn edit 15209 seneca rd. darnestown md 20874 most of calleva s private horseback riding parties take place here . all calleva explorers groups are taken here for half a day of activities which includes horseback riding and archery adventure island edit potomac river md va calleva s private island located in the potomac river . on it are ropes courses green buildings and trails . the island is surrounded by river and rapids . see also edit camp calleva references edit this article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations . please help to improve this article by introducing more precise citations . august 2008 learn how and when to remove this template message chadwick melissa a. july 26 2006 . calleva puts a little adventure in summer . kids let loose and relax as they learn at poolesville camp . the gazette gaithersburg md . retrieved 2008 07 23 . poma elissa leibowitz october 25 2006 . scared out of your ... town markoff s haunted forest dickerson md. . the washington post . p. c02 . retrieved 2008 07 23 . external links edit calleva retrieved from https en.wikipedia.org w index.php title calleva & oldid 729717270 categories camping in the united statessummer camps in marylandsummer camps in virginiaoutdoor education organizationseducational organizations based in the united stateshidden categories articles with topics of unclear notability from november 2009all articles with topics of unclear notabilityorphaned articles from august 2012all orphaned articlesarticles lacking in text citations from november 2009all articles lacking in text citationswikipedia articles with possible conflicts of interest from november 2009articles lacking in text citations from august 2008 navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages add links this page was last modified on 14 july 2016 at 02 19 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view