Around here
Around Merrimack River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US · Forest roads: USDA Forest Service MVUM · BLM routes and areas: Bureau of Land Management (simplified for web display)
About this river
Merrimack River is a 62.1 mile river near Boundless Adventures Zipline and Aerial Park in Massachusetts. Streamflow is measured at the USGS gauge Merrimack River below Concord River at Lowell, MA (site 01100000). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1923 to 2026
Merrimack River typically runs highest in April, at a median 17,550 cfs, and lowest in September, at 2,090 cfs. The highest flow on record for any single day is 161,000 cfs, in 1936.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 6,280 | 4,350 to 9,350 |
| February | 6,230 | 4,370 to 9,320 |
| March | 10,200 | 6,960 to 15,400 |
| April | 17,550 | 12,050 to 25,000 |
| May | 9,210 | 6,990 to 14,200 |
| June | 4,870 | 3,235 to 8,060 |
| July | 2,740 | 1,770 to 4,320 |
| August | 2,140 | 1,440 to 3,590 |
| September | 2,090 | 1,420 to 3,400 |
| October | 3,030 | 1,970 to 4,810 |
| November | 5,300 | 3,315 to 9,045 |
| December | 6,440 | 4,070 to 10,700 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 103 years of record. Statistics published by the US Geological Survey for Merrimack River below Concord River at Lowell, MA (site 01100000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
8 mapped launches sit in the mapped area of Merrimack River. Ramp data comes from the USGS national boat-ramp inventory.
- Merrimack River (Southwell)Merrimack RiverPublic
- Flint PondFlint PondPublic
- Mascuppic LakeMascuppic LakePublic
- Town of Ipswich WharfIpswich RiverPublic
- Merrimack RiverMerrimack RiverRestricted
- Merrimack River (Riverfront Park)Merrimack RiverPublic
- Merrimack River (Methuen)Merrimack RiverPublic
- Eagle Hill Public LandingEagle Hill RiverPublic
Made to print
Put Merrimack River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Merrimack River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
