Statewide Middle-Mile Network Map

Track the Build: Project Status Map

The Project Status Interactive Network Map visualizes the current progress of network route miles across various statuses: pre-construction, installation, and ready-to-connect. If you’re specifically interested in when the Middle-Mile will be available in your area, explore the map and click on a county. This action will highlight the statuses at which those miles are currently being installed. A pop-up box will also appear, offering further details about the county. For a more detailed breakdown, refer to the table below, which outlines each county’s installation miles (pre-construction, installation, and ready-to-connect).

Regional construction updates can be found on the Network Regions page.

Network Miles by County

Table Description:

• County: Location of the network.
• Pre-Construction Miles: The activities are design, engineering, and permitting.
• Installation Miles: In the Installation status, the following activities are performed: Conduit Installation, Vault Placement, Fiber Pulling, Splicing, Hub Placement, Power Connection, and Electronics Installation. 
• Ready-to-Connect Miles: In the Ready-to-Connect status, the following activities are performed: the network service center is established. Network testing occurs to confirm that segment(s) is operational and secure.
• Total Miles: Total network miles for county.

County Name	Pre-Construction Miles	Installation Miles	Ready-to-Connect Miles	Total Miles
Alameda	8.7	102.1	0	110.8
Alpine	41.0	2.5	0	43.5
Amador	52.6	53.6	0	106.2
Butte	63.4	51.4	0	114.8
Calaveras	84.2	20.8	0	105.0
Colusa	0.8	42.4	0	43.2
Contra Costa	38.0	56.2	0	94.2
Del Norte	54.4	10.0	0	64.4
El Dorado	72.6	47.6	0	120.2
Fresno	61.9	229.1	0	291.0
Glenn	10.5	38.6	0	49.1
Humboldt	111.4	141.3	0	252.7
Imperial	3.4	225.1	0	228.5
Inyo	0	0	147.2	147.2
Kern	41.3	381.2	31.5	454.0
Kings	2.7	130.7	0	133.4
Lake	0	89.7	0	89.7
Lassen	29.6	168.0	0	197.6
Los Angeles	140.1	282.6	0	422.7
Madera	54.3	38.4	0	92.7
Marin	31.5	9.5	0	41.0
Mariposa	90.4	0	0	90.4
Mendocino	117.7	132.7	0	250.4
Merced	9.6	119.6	0	129.2
Modoc	112.0	61.5	0	173.5
Mono	12.5	0	175.3	187.8
Monterey	1.4	149.7	0	151.1
Napa	0	17.3	0	17.3
Nevada	53.6	26.8	0	80.4
Orange	5.6	90.0	0	95.6
Placer	99.5	21.0	0	120.5
Plumas	14.4	42.0	0	56.4
Riverside	7.3	247.9	0	255.2
Sacramento	79.6	86.2	0	165.8
San Benito	57.5	42.9	0	100.4
San Bernardino	326.4	192.4	69.0	587.8
San Diego	1.2	189.1	0	190.3
San Francisco	3.2	15.7	0	18.9
San Joaquin	67.2	108.2	0	175.4
San Luis Obispo	65.7	87.4	0	153.1
San Mateo	2.2	31.8	0	34.0
Santa Barbara	84.6	105.3	0	189.9
Santa Clara	21.0	91.7	0	112.7
Santa Cruz	0.1	10.0	0	10.1
Shasta	87.1	67.4	0	154.5
Sierra	0	32.8	0	32.8
Siskiyou	143.9	167.8	0	311.7
Solano	8.1	52.6	0	60.7
Sonoma	42.0	72.0	0	114.0
Stanislaus	38.4	87.6	0	126.0
Sutter	10.0	58.9	0	68.9
Tehama	28.2	107.6	0	135.8
Trinity	0.1	72.5	0	72.6
Tulare	24.4	230.9	0	255.3
Tuolumne	77.5	4.3	0	81.8
Ventura	28.9	71.2	0	100.1
Yolo	12.1	84.4	0	96.5
Yuba	23.2	27.4	0	50.6
Grand Total Miles	2,659.0	5,127.4	423.0	8,209.4

Note: Installation miles reflect segments where physical construction is actively underway. In any given month, additional miles may have been permitted by partners who have not yet broken ground. Those miles will be reflected here as construction begins.

Updated June 29, 2026

Data

• Map Update Log – Summary of route and map updates on the Statewide Middle-Mile Network Map.
• Middle-Mile Broadband Network – Download a CSV, Shapefile, GeoJSON, and/or KML of the current network. 
• California State Geoportal – Discover, analyze, and download Middle-Mile Broadband Initiative data from the California State Geoportal.