Colorado begins its life at Centinela, changing from Idaho on the L.A. side of the street. It's a residential area, lined with Eucalyptus trees as it begins.
Nestled among the old craftsman cottages and newer apartment buildings is the Santa Monica Bahá'í center. I know only a little about Bahá'ism, but my general sense of it, in SAT analogy format is Christianity:Unitarianism::Islam:Bahá'ism.It's a generally pretty liberal faith, focusing on unity and peacefulness, although probably a bit more focused on doctrines than most Unitarians.
The Bahá'ís aren't the only people with a religious community along Colorado Avenue. There's also the Westside Christian fellowship who have taken over an older industrial building for their purposes.
Did you know that there's a mobile home community in Santa Monica?
Apparently, there were plans for there to no longer be this community, although the time table was extended. It appears that the redevelopment plans are still in the works, but have not yet led to the beginnings of evictions yet.
Past the mobile home park, we continue to see more light industrial buildings, with a fair number of for lease signs up. The transition to office space is marked by the Evergreen Community School, with some surrealistic poetry by young children hanging from the tree outside the school.
The offices here are home to a number of media giants, including MTV, Universal Music, Lionsgate films etc. Two of the largest mixed-tenant complexes are the Water Gardens, which look cool from space, but pretty nice from ground level as well. Of course, the work environment doesn't necessarily call out to the casual passerby, but there are a surprising variety of dining options within the complex. Given that I was walking through on the evening of Memorial Day, it was a bit of a surprise to see people walking and reading in the courtyard.
On the other side of Colorado lies the Yahoo Center, which has a less thrilling center courtyard area, but had even more activity including this mysterious group of fan dancers.
Walking a bit further down, I discover that the Santa Monica Collection is not the only company providing large soulless apartment buildings in the bay city.
This building is available for lease. The sign didn't indicate whether the furniture and boxes were included, or if they'd fix the broken windows through which I shot the picture.
St Anne's Catholic Church and Shrine was founded as a mission of St Monica's parish in 1908 (St Monica's was founded in 1886). It includes a K-8 school and is an "and shrine" because Father Hawes, the founding pastor of St Monica's who was responsible for the opening of St Anne's, brought back relics of St Anne in 1913 which have been kept at the parish ever since. Unlike St Monica, which is an amazingly white Catholic church, St Anne's is a significantly Latino parish, with 3 of its 7 weekend masses in Spanish and a weekly citizenship class.
As we proceed down Colorado, we come to a new district which is geared largely to building/remodeling businesses, but also features a cement factory and a plastics formulator and dealer, as well as assorted glass, flagstone, electrical etc. companies. There are still the occasional creative businesses mixed in, including PB&J which I looked up and turned out to be a production company for reality TV.

I know nothing about Tulip Cafe, but liked this graffiti-style mural on its side wall.
I'm a sucker for models.
According to Google, this building either houses a moving company or a tech consulting company. It doesn't look big enough to hold both.
And here's a classic looking electrical switching station.
The Big Blue Bus people are building a new central garage and maintenance facility.
Fritto Misto is one of my favorite Santa Monica restaurants. I recommend getting the pasta special. You'll get a large salad and a moderate sized serving of pasta. Perfectly proportioned and both delicious and nutritious and at a good price as well. It always surprises me that the restaurant is not crowded when I've been there.
Further down the street is Angel's Attic, a museum of dolls and dollhouses in a restored Queen Anne Victorian home (one of two remaining in Santa Monica according to the museum's web site).
This Midas store is in an attractive 1920s building.
This sign over the Sears Automotive store is a great bit of 1950s typography. The building has been bought by the City of Santa Monica for a future transit depot for the Expo Line terminus (and perhaps also eventually the purple line).
Colorado Avenue ends at the Santa Monica pier, itself worthy of a day's visit and post-visit blogging, perhaps some other day.

NP: "Sahara," Justin Adams and Juldeh Camera, Tell No Lies.
WC: 72,229. ECD: 5 Sep 2009.