Boston Marathon logo
BOSTON MARATHON 2025

Kelly Niederloh

Bib: 14298•F

MN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 9%
Division (F18-39)
#0 / 5469
Top 17%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:11/mi
22:19
↑ 97↓ 3451.5%
10K· 6.21 mi
7:10/mi
44:34
↑ 79↓ 1380.4%
15K· 9.32 mi
7:15/mi
1:07:06
↑ 67↓ 78
20K· 12.43 mi
7:14/mi
1:29:35
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:34:29
↑ 19↓ 370.5%
25K· 15.53 mi
7:19/mi
1:52:13
↑ 66↓ 880.2%
30K· 18.64 mi
7:31/mi
2:15:33
↑ 181↓ 1480.2%
20M
7:30/mi
2:25:45
↑ 64↓ 500.2%
21M
7:52/mi
2:33:37
↑ 106↓ 241.6%
35K· 21.75 mi
7:08/mi
2:38:57
↑ 17↓ 861.7%
23M
7:21/mi
2:48:09
↑ 23↓ 630.6%
24M
7:03/mi
2:55:12
↓ 821.3%
40K· 24.85 mi
7:06/mi
3:01:16
↓ 200.3%
25.2M
7:47/mi
3:03:57
↑ 13↓ 160.2%
Finish· 26.22 mi
6:42/mi
3:10:47
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:29
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time1:36:18
Pace7:21 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4722:197:1122:19
7:11
-
10K
6.21 mi11:15:0244:347:1022:15
7:10
-0:01
15K
9.32 mi11:37:341:07:067:1222:32
7:15
+0:05
20K
12.43 mi12:00:031:29:357:1322:29
7:14
-0:01
Half
13.11 mi12:04:571:34:297:124:54
7:11
-0:03
25K
15.53 mi12:22:411:52:137:1317:44
7:19
+0:08
30K
18.64 mi12:46:012:15:337:1623:20
7:31
+0:12
20M
20.00 mi12:56:132:25:457:1710:12
7:30
-0:01
21M
21.00 mi13:04:052:33:377:197:52
7:52
+0:22
35K
21.75 mi13:09:252:38:577:195:20
7:08
-0:44
23M
23.00 mi13:18:372:48:097:199:12
7:21
+0:13
24M
24.00 mi13:25:402:55:127:187:03
7:03
-0:18
40K
24.85 mi13:31:443:01:167:186:04
7:06
+0:03
25.2M
25.20 mi13:34:253:03:577:182:41
7:47
+0:41
Finish
26.22 mi13:41:153:10:477:176:50
6:42
-1:05

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:42 /mi

Average Pace

7:17 /mi

Slowest Pace

7:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:26:42

77% of race

Time at Steady Pace

44:05

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:17 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:52:4722:197:1122:19
7:11
#9329
10K
6.21 mi11:15:0244:347:1022:15
7:10
#9219
15K
9.32 mi11:37:341:07:067:1222:32
7:15
#9338
20K
12.43 mi12:00:031:29:357:1322:29
7:14
#9069
Half
13.11 mi12:04:571:34:297:124:54
7:11
#9057
25K
15.53 mi12:22:411:52:137:1317:44
7:19
#8896
30K
18.64 mi12:46:012:15:337:1623:20
7:31
#8610
20M
20.00 mi12:56:132:25:457:1710:12
7:30
#8440
21M
21.00 mi13:04:052:33:377:197:52
7:52
#8266
35K
21.75 mi13:09:252:38:577:195:20
7:08
#8122
23M
23.00 mi13:18:372:48:097:199:12
7:21
#7890
24M
24.00 mi13:25:402:55:127:187:03
7:03
#7712
40K
24.85 mi13:31:443:01:167:186:04
7:06
#7538
25.2M
25.20 mi13:34:253:03:577:182:41
7:47
#7466
Finish
26.22 mi13:41:153:10:477:176:50
6:42
#7268
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9329151815189584(Top 34%)1688(Top 14%)1688(Top 31%)
10K6.21 mi3.10 mi9219+1101465+531465+539176(Top 32%)1449(Top 12%)1449(Top 26%)
15K9.32 mi3.11 mi9338-1191537-721537-729584(Top 34%)1688(Top 14%)1688(Top 31%)
20K12.43 mi3.11 mi9069+2691446+911446+918513(Top 30%)1317(Top 11%)1317(Top 24%)
Half13.11 mi0.68 mi9057+121442+41442+48969(Top 32%)1470(Top 12%)1470(Top 27%)
25K15.53 mi2.42 mi8896+1611400+421400+428471(Top 30%)1400(Top 11%)1400(Top 26%)
30K18.64 mi3.11 mi8610+2861338+621338+627822(Top 28%)1315(Top 11%)1315(Top 24%)
20M20.00 mi1.36 mi8440+1701307+311307+317074(Top 25%)1174(Top 10%)1174(Top 21%)
21M21.00 mi1.00 mi8266+1741270+371270+376604(Top 23%)1148(Top 9%)1148(Top 21%)
35K21.75 mi0.75 mi8122+1441240+301240+306194(Top 22%)984(Top 8%)984(Top 18%)
23M23.00 mi1.25 mi7890+2321202+381202+385763(Top 20%)918(Top 8%)918(Top 17%)
24M24.00 mi1.00 mi7712+1781167+351167+354959(Top 17%)724(Top 6%)724(Top 13%)
40K24.85 mi0.85 mi7538+1741142+251142+254498(Top 16%)645(Top 5%)645(Top 12%)
25.2M25.20 mi0.35 mi7466+721129+131129+134865(Top 17%)832(Top 7%)832(Top 15%)
Finish26.22 mi1.02 mi7268+1981076+531076+533954(Top 14%)546(Top 4%)546(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9584

Females

1688

F18-39

1688

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

9176

Females

1449

F18-39

1449

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9584

Females

1688

F18-39

1688

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8513

Females

1317

F18-39

1317

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8969

Females

1470

F18-39

1470

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

8471

Females

1400

F18-39

1400

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7822

Females

1315

F18-39

1315

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7074

Females

1174

F18-39

1174

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6604

Females

1148

F18-39

1148

21M→35K

21.0 - 21.8 mi

Top 22%
×7story building
+17ft-86ft

Overall

6194

Females

984

F18-39

984

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5763

Females

918

F18-39

918

23M→24M

23.0 - 24.0 mi

Top 17%
×6story building
+12ft-82ft

Overall

4959

Females

724

F18-39

724

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4498

Females

645

F18-39

645

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4865

Females

832

F18-39

832

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2story building
+22ft-21ft

Overall

3954

Females

546

F18-39

546

Passing Analysis

Category:
Athletes Passed
2781
Passed By
720
Net Change
+2061
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9329
5K → 10K294184+110#9329#9219
10K → 15K115234-119#9219#9338
15K → 20K32051+269#9338#9069
20K → Half4230+12#9069#9057
Half → 25K23372+161#9057#8896
25K → 30K36175+286#8896#8610
30K → 20M18818+170#8610#8440
20M → 21M19117+174#8440#8266
21M → 35K1506+144#8266#8122
35K → 23M24210+232#8122#7890
23M → 24M1868+178#7890#7712
24M → 40K1762+174#7712#7538
40K → 25.2M819+72#7538#7466
25.2M → Finish2024+198#7466#7268
TOTALS2781720+2061
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing