Monrovia Historical Museum
A City of Monrovia Historic Landmark
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AUGUST ALMANAC

8/1/2026

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1886: Monrovia's Land Boom 
-  Monrovia's first major land boom escalated as town lot sales surged following the townsite’s opening earlier that year. A significant influx of investors from Los Angeles and Pasadena drove a dramatic increase in the construction of residential and commercial properties. By August, only months after the initial sale on May 17, 1886, (annual Monrovia Days) the community was flourishing, with buyers confident in its future as a premier Southern California destination. The very first lot purchase was made by Mrs. Katherine Wilson, who was living in nearby Duarte at the time. She purchased the northwest corner of Myrtle and Orange (now Colorado Boulevard)—one of the most prominent commercial corners in the new town. 
-  A distinctive policy set Monrovia apart from other speculative developments: founders mandated that lot owners build a residence within six months. This rule fostered a genuine community of residents rather than absentee speculators. During this summer of growth, water systems were designed, streets were surveyed, and thousands of pepper trees were pledged as construction continued at a high velocity.
-  Public improvements also gained momentum in August. Plans for a railroad depot on Myrtle Avenue took shape, and work progressed on public buildings, churches, and a hotel. By the month’s conclusion, contracts for the first public school were finalized, signaling Monrovia’s transition from a mere land project to a true community. This momentum led to the city’s incorporation on December 15, 1887, distinguishing it as the fourth incorporated city in the county.

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JULY ALMANAC

7/1/2026

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​1887: Rapid Transit Railway
-  July 27 – William N. Monroe incorporated the San Gabriel Valley Rapid Transit Railway, an ambitious effort to connect Monrovia directly with Los Angeles.

1888: The Monrovia Messenger
-  The Monrovia Messenger debuted, providing residents with local news, building permits, obituaries, and community happenings.

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JUNE ALMANAC

6/1/2026

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1886: Lot Sales Active
-  The first lots in the new townsite of Monrovia were actively being sold during the great Southern California land boom.

1903: Pacific Electric Railway Expansion
-  The Pacific Electric Railway expansion helped connect Monrovia more directly with Los Angeles, contributing to the city's early growth and popularity.

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MAY ALMANAC

5/1/2026

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1886 May 17 – Monrovia was founded as town lots were first sold.
1887 – Monrovia became one of the earliest incorporated cities in Los Angeles County.
Early 1900s – Expansion of rail and road systems fuels local growth and commerce.
1938 May 19 – First airmail flight departs from Monrovia Airport.
Annually – Monrovia Historic Home Tour showcases local heritage properties in early-May.
Annually – Monrovia Days celebrates the city's founding with parade and festivities in mid-May.
Various Years – Community schools and civic groups host spring programs and exhibitions in May. 
Modern Era – Old Town Monrovia events and street fairs draw residents and visitors in May.
Ongoing Tradition – Local museums and historical groups debut new exhibits and programs in May.
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APRIL ALMANAC

4/1/2026

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Early Roots: 
1841
– Rancho Santa Anita land grant (Hugo Reid)

Growth & Development: 
1875
– Lucky Baldwin acquires the land
1880s – Town Formation boom

Transportation & Route 66
1926 April 30
– Route 66 established

Landmarks & Preservation
1978 April 6
– The Oaks added to the National Register
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