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BOSTON MARATHON 2025

Nora Shields

NJ

Bib: 13923 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 20%
Gender (Female)
#0 / 12228
Top 5%
Division (F18-39)
#0 / 5469
Top 9%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:06/mi
22:02
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:01/mi
43:51
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:55/mi
1:05:19
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:55/mi
1:26:48
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:52/mi
1:31:29
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:53/mi
1:48:11
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:02/mi
2:10:01
↑ 181↓ 1480.2%
138 ft elev
20M
7:05/mi
2:19:39
↑ 64↓ 500.2%
148 ft elev
21M
7:27/mi
2:27:06
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:49/mi
2:32:12
↑ 17↓ 861.7%
156 ft elev
23M
7:13/mi
2:41:14
↑ 23↓ 630.6%
116 ft elev
24M
7:08/mi
2:48:22
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:16/mi
2:54:35
↓ 200.3%
20 ft elev
25.2M
8:04/mi
2:57:22
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:20/mi
3:04:50
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:31:296:59 /mi⚡ faster
2nd Half
1:33:217:07 /mi+2.0%
Positive split — 2.0% slower in the second half
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5422:027:0622:02
7:06
-
10K
6.21 mi11:12:4343:517:0321:49
7:01
-0:05
15K
9.32 mi11:34:111:05:197:0021:28
6:55
-0:06
20K
12.43 mi11:55:401:26:486:5921:29
6:55
0:00
Half
13.11 mi12:00:211:31:296:594:41
6:52
-0:03
25K
15.53 mi12:17:031:48:116:5816:42
6:53
+0:01
30K
18.64 mi12:38:532:10:016:5821:50
7:02
+0:09
20M
20.00 mi12:48:312:19:396:599:38
7:05
+0:03
21M
21.00 mi12:55:582:27:067:007:27
7:27
+0:22
35K
21.75 mi13:01:042:32:127:005:06
6:49
-0:38
23M
23.00 mi13:10:062:41:147:019:02
7:13
+0:24
24M
24.00 mi13:17:142:48:227:017:08
7:08
-0:05
40K
24.85 mi13:23:272:54:357:016:13
7:16
+0:08
25.2M
25.20 mi13:26:142:57:227:022:47
8:04
+0:48
Finish
26.22 mi13:33:423:04:507:037:28
7:20
-0:44

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

6:49 /mi

Average Pace

7:03 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:02:03

98% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

2:47

2% of race

Average Pace: 7:03 /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 mi10:50:5422:027:0622:02
7:06
#8564
10K
6.21 mi11:12:4343:517:0321:49
7:01
#8330
15K
9.32 mi11:34:111:05:197:0021:28
6:55
#7811
20K
12.43 mi11:55:401:26:486:5921:29
6:55
#7395
Half
13.11 mi12:00:211:31:296:594:41
6:52
#7341
25K
15.53 mi12:17:031:48:116:5816:42
6:53
#7025
30K
18.64 mi12:38:532:10:016:5821:50
7:02
#6507
20M
20.00 mi12:48:312:19:396:599:38
7:05
#6273
21M
21.00 mi12:55:582:27:067:007:27
7:27
#6124
35K
21.75 mi13:01:042:32:127:005:06
6:49
#6033
23M
23.00 mi13:10:062:41:147:019:02
7:13
#5869
24M
24.00 mi13:17:142:48:227:017:08
7:08
#5788
40K
24.85 mi13:23:272:54:357:016:13
7:16
#5717
25.2M
25.20 mi13:26:142:57:227:022:47
8:04
#5693
Finish
26.22 mi13:33:423:04:507:037:28
7:20
#5716
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8564118111817032744744
10K6.21 mi3.10 mi8330+2341114+671114+67808610371037
15K9.32 mi3.11 mi7811+519938+176938+1767032744744
20K12.43 mi3.11 mi7395+416821+117821+1176321625625
Half13.11 mi0.68 mi7341+54808+13808+136721699699
25K15.53 mi2.42 mi7025+316734+74734+745588511511
30K18.64 mi3.11 mi6507+518652+82652+824882431431
20M20.00 mi1.36 mi6273+234621+31621+314643425425
21M21.00 mi1.00 mi6124+149612+9612+94392458458
35K21.75 mi0.75 mi6033+91604+8604+84269450450
23M23.00 mi1.25 mi5869+164577+27577+274988665665
24M24.00 mi1.00 mi5788+81574+3574+35431856856
40K24.85 mi0.85 mi5717+71572+2572+25508934934
25.2M25.20 mi0.35 mi5693+24573-1573-1635513581358
Finish26.22 mi1.02 mi5716-23598-25598-25796820432043

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

7032

Females

744

F18-39

744

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

8086

Females

1037

F18-39

1037

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

7032

Females

744

F18-39

744

15K→20K

9.3 - 12.4 mi

Top 22%
×5story building
+106ft-86ft

Overall

6321

Females

625

F18-39

625

20K→Half

12.4 - 13.1 mi

Top 24%
×2story building
+19ft-37ft

Overall

6721

Females

699

F18-39

699

Half→25K

13.1 - 15.5 mi

Top 20%
×4story building
+66ft-88ft

Overall

5588

Females

511

F18-39

511

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4882

Females

431

F18-39

431

30K→20M

18.6 - 20.0 mi

Top 16%
×5story building
+64ft-50ft

Overall

4643

Females

425

F18-39

425

20M→21M

20.0 - 21.0 mi

Top 15%
×8story building
+106ft-24ft

Overall

4392

Females

458

F18-39

458

21M→35K

21.0 - 21.8 mi

Top 15%
×7story building
+17ft-86ft

Overall

4269

Females

450

F18-39

450

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

4988

Females

665

F18-39

665

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5431

Females

856

F18-39

856

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5508

Females

934

F18-39

934

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6355

Females

1358

F18-39

1358

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

7968

Females

2043

F18-39

2043

Passing Analysis

Category:
Athletes Passed
3150
Passed By
302
Net Change
+2848
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8564
5K → 10K350116+234#8564#8330
10K → 15K5278+519#8330#7811
15K → 20K4215+416#7811#7395
20K → Half573+54#7395#7341
Half → 25K3204+316#7341#7025
25K → 30K5279+518#7025#6507
30K → 20M2406+234#6507#6273
20M → 21M15910+149#6273#6124
21M → 35K954+91#6124#6033
35K → 23M1706+164#6033#5869
23M → 24M10019+81#5869#5788
24M → 40K9019+71#5788#5717
40K → 25.2M4521+24#5717#5693
25.2M → Finish4972-23#5693#5716
TOTALS3150302+2848

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing