Interstate 37 North - San Antonio

A rural diamond interchange (Exit 120) joins Interstate 37 with Hardy Road in one mile.

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Hardy Road serves ranch areas and several homesteads in south Bexar County.

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Exit 120 departs IH 37 north for Hardy Road west to Campbellton Road and east to Mathis Road.

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The roadways separate to accommodate a wide tree lined median as Interstate 37 climbs to 600 feet above sea level.

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Mathis Road parallels IH 37 north from Hardy Road to tie into the freeway at Priest Road and Exit 122.

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Mathis Road extends northwest from Exit 122 to Campbellton Road. Priest Road spokes northeast from the exchange to FM 1604 (C.W. Anderson Loop).

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New Mathis Road stems east from the modified diamond interchange (Exit 122) with IH 37 into the city of Sandy Oaks. Resembling a large scale subdivision with oversized lots, Sandy Oaks incorporated on May 14, 2014.

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Intestate 37 turns more easterly from Sandy Oaks north to Exit 125 with SL 1604 (C.W. Anderson Loop).

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State Loop 1604 (Charles William Anderson Loop) encircles the San Antonio metropolitan area along a 94.39 mile course. The beltway comprises a busy commuter freeway with toll lanes along the north side of the city. The southern portion remains rural, with just two lanes west to the city of Somerset and northeast to the city of Elmendorf.

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Slip ramps link IH 37 with the adjacent frontage roads to connect with SL 1604 (Anderson Loop). The belt route meets IH 10 at Converse and the U.S. 90 freeway near the Lackland Training Annex military reservation.

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Continuing north, Interstate 37 approaches the San Antonio city limits ahead of Victor Braunig Lake.

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Downtown San Antonio is still another 15 miles north along IH 37 and U.S. 281.

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Forthcoming Exit 127 serves Braunig Lake Park, which lines the east side of IH 37. Braunig Lake was constructed in 1961-62 to support a power plant operated by the city of San Antonio. The reservoir is also a popular spot for fishing.

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Prior to reaching Braunig Lake, IH 37 crosses the San Antonio River, which is a spring-fed waterway originating in San Antonio. Traffic utilizes substandard bridges built in 1968.

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Marked as the San Antonio River turnaround, Exit 127 departs for the adjacent I-37 Frontage Road.

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San Antonio boasts around 1.5 million residents. The last miles of Interstate 37 travel wholly within the city limits.

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Advancing north by Victor Braunig Lake, the succeeding exit of IH 37 north ties into east/west Southton Road and north/south Donop Road.

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One half mile ahead of the modified diamond interchange (Exit 130) with Donop and Southton Roads. The area is marked by several industrial businesses, a handful of traveler services, a RV park, and the Reserve at Southton Ranch subdivision.

04/10/05

Southton Road loops northwest to IH 410 while Donop Road angles northeast from Exit 130 to Old Corpus Christi Road and U.S. 181. there is no direct access to U.S. 181 south from the subsequent northbound interchange.

04/10/05

This confirming shield for Interstate 37 north stands just beyond a the 1967-built Union Pacific Railroad underpass.

09/29/07

U.S. 181 northbound merges with Interstate 37 and ends at a wye interchange, 1.5 miles south of the Interstate 410 beltway.

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State Spur 122 (Presa Street) extends 5.66 miles north along a portion of former U.S. 181 to Loop 13 (Military Drive).

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Exit 132 lowers from Interstate 37 north to SS 122 (Presa Street) as the freeway advances one mile north to IH 410 and U.S. 281 south (Exit 133).

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Interstate 410 is the Connally Loop, a 49.49 mile long beltway around San Antonio.

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Exit 133 separates from the IH 37 northbound mainline just beyond the Old Corpus Christi Highway underpass. U.S. 281 meets Loop 410 and travels 3.8 miles east to rejoin IH 37 north through San Antonio.

04/10/05

Two lanes advance north toward Downtown San Antonio as Exit 133 parts ways with IH 37 north for Interstate 410. The southern portion of the Connally Loop retains just four overall lanes as it is the least traveled.

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IH 410 travels north from IH 37 around the east side of the city to Kirby and west across south San Antonio toward Lackland A.F.B.

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The four-level interchange at IH 410 was constructed in 1968 as part of the original IH 37 construction in San Antonio.

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Interstate 37 & U.S. 281 advance north from IH 610 between Indian Homes Mobile Home Park and Salado Creek. Areas west of parallel Goliad Road were formerly a part of Brooks Air Force Base.

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Loop 13 (Military Drive), the predecessor to Interstate 410, meets the freeway in 0.75 miles.

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Prior to 2009, Exit 135 consisted of a cloverleaf interchange with collector distributor roadways. Construction reconfigured the exchange into a standard diamond.

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Loop 13 angles east from Exit 135 by the Highlands community to become W.W. White Road north into the Eastern Triangle area of San Antonio. The state highway totals 21.68 miles west to U.S. 90 at Lackland A.F.B. and north to IH 410 near Kirby.

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Interstate 37 curves northwest across Goliad Road and enters a diamond interchange (Exit 136) with Pecan Valley Road. Pecan Valley Road winds northeast along a four lane divided boulevard through the Highlands neighborhood.
A new sign bridge replaced this ground level sign at Exit 136 by 2011.

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Exit 137 lies just a half mile northwest of the Pecan Valley Road underpass with Hot wells Boulevard. Hot Wells Boulevard stems west from Goliad Road to Presa Street (old U.S. 181) through the South Central community.

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Construction in 2009-10 replaced the low clearance overpass carrying Hot Wells Boulevard across Interstate 37 & U.S. 281 at Exit 137. Prior to that project, over height trucks were required to use the exit ramps to circumvent the span.

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Former ground level sign posted for Southcross Boulevard and New Braunfels Avenue at the original Hot Wells Boulevard over crossing. The advance sign for Exit 138 was moved further south on a new sign bridge.

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The lone off-ramp from IH 37 & U.S. 281 north to Southcross Boulevard at Gevers Street is numbered as Exits 138A/B to provide continuity with the separate ramps from IH 37 southbound.
Southcross Boulevard and New Braunfels Avenue intersect just west of the freeway at the Hotwells neighborhood.

09/29/07

The on-ramp from Southcross Boulevard adds an auxiliary lane to Interstate 37 north to the diamond interchange (Exit 138C) with Fair Avenue. Hackberry Street, a minor north-south arterial, intersects Fair Avenue just west of the exchange.

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Exit 138C leaves IH 37 & U.S. 281 north for Fair Avenue east to Highlands and west to Presa Street (old U.S. 181). The freeway continues north with four lanes to the symmetrical stack interchange (Exit 139) with IH 10 & U.S. 87-90.

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A frontage road accompanies the east side of IH 37 to Hackberry Street as the route advances northwest across the San Antonio street grid to IH 10.

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Interstate 10 west to IH 35 and east to IH 410 in San Antonio is the Jose Lopez Freeway.

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A pair of lanes depart for Interstate 10 & U.S. 87-90 at the Steves Avenue underpass. The trio overlap for 4.2 miles west from Roland Road at the Eastern Triangle to IH 35. U.S. 87 remains paired with IH 10 northwest to Comfort, while U.S. 90 runs with concurrently with the freeway to Seguin.

09/29/07

Interstate 37 & U.S. 281 north maintain three through lanes as Exit 139 parts ways for IH 10 east to Houston and west around Downtown San Antonio to Kerrville and El Paso. Johnson City replaces San Antonio as the control city for the continuation of U.S. 281 north to the Blanco County seat, located 64 miles from here.

09/29/07

Traffic separates for the respective ramps to IH 10. U.S. 90 follows the Cleto Rodriguez Freeway west beyond IH 10 to Loop 1604 outside San Antonio. The US highway travels west to Del Rio. U.S. 87 branches south from IH 10 en route to China Grove and Victoria.

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The Tower of the Americas and the rest of the San Antonio skyline comes into view as Interstate 37 travels over Interstate 10 through their four-level exchange.

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Merging traffic from IH 10 expands IH 37 & U.S. 281 north to five overall lanes to the Carolina and Florida Street off-ramp (Exit 140A).

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Crossing over two Union Pacific Railroad lines and Boyer Street, IH 37 & U.S. 281 reach the split diamond interchange (Exit 140A) with Carolina and Florida Streets to the Lavaca Historic District.

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The first advance signs for IH 35 (Exits 142A/B) precede the Exit 140 off-ramp to Cesar E. Chavez Boulevard. The ensuing roadway runs along the east side of Hemisfair Park, which is home to the Tower of the Americas, the Institute of Texan Cultures and the Henry B. Gonzalez Convention Center.

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Exit 141 follows the Cesar E. Chavez Boulevard underpass for Commerce Street west into Downtown. The Alamo lies just north of Commerce Street at Alamo Plaza.

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Cesar E. Chavez Boulevard meanders west by Hemisfair Plaza and La Villita Historic Arts Village to IH 10-35 & U.S. 87 at the University of Texas - San Antonio Downtown Campus.

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A five mile stretch of Durango Boulevard was renamed to honor labor leader and civil rights activist Cesar E. Chavez by San Antonio city council in 2011.¹ The boulevard originates at Hackberry Street, four blocks east of Exit 140B.

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The Alamodome, a concert and sports area, rises along the east side of Interstate 37 & U.S. 281 ahead of Montana Street. The venue opened in 1993, hosting the NBA San Antonio Spurs until 2002, and three home games for the New Orleans Saints in 2005. The NCAA Alamo Bowl is played at the Alamodome annually.

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Exit 141 connects with Commerce Street adjacent to St. Paul Square.

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Northbound Interstate 37 & U.S. 281 at the Commerce Street off-ramp (Exit 141) to Downtown and The Alamo. IH 37 ends 1.5 miles ahead at Interstate 35.

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Shifting eastward by Dignowity Hill, IH 37 & U.S. 281 approach the systems interchange (Exits 142A/B) with Interstate 35.

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U.S. 281 (McAllister Freeway) extends north from the ending IH 37 to Alamo Heights, North Central and San Antonio International Airport (SAT).

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A nine lane viaduct carries motorists along IH 37 & U.S. 281 above 9th Street. Nearly simultaneous lane drops occur along the northbound freeway for IH 35 north to New Braunfels and Austin and IH 35 south to IH 10 and Laredo.

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Interstate 35 constitutes a heavily traveled route from San Antonio north to Austin, Temple, Waco and Hillsboro, where it separates into east and west branches through the Dallas Fort Worth metroplex.

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Exit 142A parts ways from IH 37 & U.S. 281 north for IH 35 as it travels east through Government Hill to Fort Sam Houston and IH 410.

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A left hand ramp (Exit 142B) follows for IH 35 south as it wraps around the north side of Downtown from the San Antonio River west to the merge with IH 10 east.

12/31/02