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BOSTON MARATHON 2023

Grace Ackerman

Bib: 15485•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 32%
Gender (Female)
#0 / 11423
Top 13%
Division (F18-39)
#0 / 4884
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:25/mi
23:03
↑ 97↓ 3451.5%
10K· 6.21 mi
7:30/mi
46:22
↑ 79↓ 1380.4%
15K· 9.32 mi
7:39/mi
1:10:09
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:33:58
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:39:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:35/mi
1:57:26
↑ 66↓ 880.2%
30K· 18.64 mi
7:39/mi
2:21:12
↑ 181↓ 1480.2%
20M
7:37/mi
2:31:33
↑ 64↓ 500.2%
21M
7:44/mi
2:39:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:25/mi
2:44:50
↑ 17↓ 861.7%
23M
7:34/mi
2:54:19
↑ 23↓ 630.6%
24M
7:30/mi
3:01:49
↓ 821.3%
40K· 24.85 mi
7:31/mi
3:08:15
↓ 200.3%
25.2M
7:44/mi
3:10:55
↑ 13↓ 160.2%
Finish· 26.22 mi
6:50/mi
3:17:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:39:04
Pace7:33 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:38:49
Pace7:32 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1323:037:2523:03
7:25
-
10K
6.21 mi11:17:3246:227:2823:19
7:30
+0:05
15K
9.32 mi11:41:191:10:097:3223:47
7:39
+0:09
20K
12.43 mi12:05:081:33:587:3423:49
7:40
+0:01
Half
13.11 mi12:10:141:39:047:335:06
7:29
-0:11
25K
15.53 mi12:28:361:57:267:3418:22
7:35
+0:06
30K
18.64 mi12:52:222:21:127:3423:46
7:39
+0:04
20M
20.00 mi13:02:432:31:337:3510:21
7:37
-0:02
21M
21.00 mi13:10:272:39:177:357:44
7:44
+0:07
35K
21.75 mi13:16:002:44:507:355:33
7:25
-0:19
23M
23.00 mi13:25:292:54:197:359:29
7:34
+0:09
24M
24.00 mi13:32:593:01:497:357:30
7:30
-0:04
40K
24.85 mi13:39:253:08:157:346:26
7:31
+0:01
25.2M
25.20 mi13:42:053:10:557:352:40
7:44
+0:13
Finish
26.22 mi13:49:033:17:537:336:58
6:50
-0:54

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

6:50 /mi

Average Pace

7:33 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:55

39% of race

Time at Steady Pace

1:59:58

61% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:33 /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 mi10:54:1323:037:2523:03
7:25
#8996
10K
6.21 mi11:17:3246:227:2823:19
7:30
#9686
15K
9.32 mi11:41:191:10:097:3223:47
7:39
#10296
20K
12.43 mi12:05:081:33:587:3423:49
7:40
#10362
Half
13.11 mi12:10:141:39:047:335:06
7:29
#10338
25K
15.53 mi12:28:361:57:267:3418:22
7:35
#10137
30K
18.64 mi12:52:222:21:127:3423:46
7:39
#9777
20M
20.00 mi13:02:432:31:337:3510:21
7:37
#9588
21M
21.00 mi13:10:272:39:177:357:44
7:44
#9313
35K
21.75 mi13:16:002:44:507:355:33
7:25
#9237
23M
23.00 mi13:25:292:54:197:359:29
7:34
#9072
24M
24.00 mi13:32:593:01:497:357:30
7:30
#8988
40K
24.85 mi13:39:253:08:157:346:26
7:31
#8886
25.2M
25.20 mi13:42:053:10:557:352:40
7:44
#8795
Finish
26.22 mi13:49:033:17:537:336:58
6:50
#8584
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi89961395139511464(Top 43%)2603(Top 23%)2603(Top 53%)
10K6.21 mi3.10 mi9686-6901698-3031698-30310488(Top 39%)2045(Top 18%)2045(Top 42%)
15K9.32 mi3.11 mi10296-6101956-2581956-25811464(Top 43%)2603(Top 23%)2603(Top 53%)
20K12.43 mi3.11 mi10362-661998-421998-4210638(Top 40%)2218(Top 19%)2218(Top 45%)
Half13.11 mi0.68 mi10338+241993+51993+510055(Top 38%)1891(Top 17%)1891(Top 39%)
25K15.53 mi2.42 mi10137+2011918+751918+759357(Top 35%)1706(Top 15%)1706(Top 35%)
30K18.64 mi3.11 mi9777+3601793+1251793+1258306(Top 31%)1430(Top 13%)1430(Top 29%)
20M20.00 mi1.36 mi9588+1891745+481745+487621(Top 29%)1264(Top 11%)1264(Top 26%)
21M21.00 mi1.00 mi9313+2751659+861659+865846(Top 22%)766(Top 7%)766(Top 16%)
35K21.75 mi0.75 mi9237+761644+151644+157977(Top 30%)1484(Top 13%)1484(Top 30%)
23M23.00 mi1.25 mi9072+1651598+461598+466943(Top 26%)1155(Top 10%)1155(Top 24%)
24M24.00 mi1.00 mi8988+841591+71591+77730(Top 29%)1570(Top 14%)1570(Top 32%)
40K24.85 mi0.85 mi8886+1021574+171574+176886(Top 26%)1317(Top 12%)1317(Top 27%)
25.2M25.20 mi0.35 mi8795+911545+291545+295146(Top 19%)791(Top 7%)791(Top 16%)
Finish26.22 mi1.02 mi8584+2111476+691476+694312(Top 16%)537(Top 5%)537(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

11464

Females

2603

F18-39

2603

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

10488

Females

2045

F18-39

2045

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

11464

Females

2603

F18-39

2603

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10638

Females

2218

F18-39

2218

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10055

Females

1891

F18-39

1891

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9357

Females

1706

F18-39

1706

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8306

Females

1430

F18-39

1430

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

7621

Females

1264

F18-39

1264

20M→21M

20.0 - 21.0 mi

Top 22%
×8story building
+106ft-24ft

Overall

5846

Females

766

F18-39

766

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

7977

Females

1484

F18-39

1484

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

6943

Females

1155

F18-39

1155

23M→24M

23.0 - 24.0 mi

Top 29%
×6story building
+12ft-82ft

Overall

7730

Females

1570

F18-39

1570

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

6886

Females

1317

F18-39

1317

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5146

Females

791

F18-39

791

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4312

Females

537

F18-39

537

Passing Analysis

Category:
Athletes Passed
2194*
Passed By
1780
Net Change
+412
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8996
5K → 10K89779-690#8996#9686
10K → 15K42650-610#9686#10296
15K → 20K132198-66#10296#10362
20K → Half4016+24#10362#10338
Half → 25K24241+201#10338#10137
25K → 30K387*27+360#10137#9777
30K → 20M1967+189#9777#9588
20M → 21M2772+275#9588#9313
21M → 35K8711+76#9313#9237
35K → 23M17712+165#9237#9072
23M → 24M11026+84#9072#8988
24M → 40K1119+102#8988#8886
40K → 25.2M910+91#8886#8795
25.2M → Finish2132+211#8795#8584
TOTALS2194*1780+412

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

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